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Nail Extensions

Nail extensions add length and shape to your natural nails using a hard-setting product built over a tip or a form. The main systems are acrylic (a liquid and powder that air-dries), hard gel and builder gel including "builder in a bottle" (BIAB) which are cured under a UV or LED lamp, and polygel which blends the two. Extensions give a stronger, longer nail that holds shape and colour well, and the look can be tailored to you, from a short, natural, everyday finish to longer, more dramatic shapes and nail art. They are a cosmetic, low-risk treatment for most people when carried out by a trained, insured technician using good hygiene. The main things to be aware of are keeping your natural nail healthy underneath, avoiding over-filing, and the growing issue of allergy to the acrylate chemicals in gel and acrylic products, which UK dermatologists have flagged as an increasing problem. With sensible aftercare and regular, gentle maintenance, extensions are a reliable way to enjoy longer, well-shaped nails.

Service

Nail extensions

Turn up with clean, product-free nails and let your technician know if you have had a reaction to nail products before, as any tingling, itching or lifting around previous sets is worth mentioning. Tell them about any skin conditions, nail infections, recent nail damage, or if you are pregnant, as this can affect what is suitable. If you take part in hands-on work or sport, or your nails split easily, share this so the length, shape and system can be tailored to your lifestyle. Avoid cutting or pushing back your cuticles hard in the days before, and skip heavy hand creams or oils on the day, as these can stop the product bonding. Bring inspiration photos if you have a particular shape or finish in mind. If you know or suspect you are allergic to gel or acrylic, do not book without discussing HEMA-free options first, and consider seeing a GP or dermatologist for advice.

Your technician will start by assessing your natural nails and tidying the cuticle area, then gently buffing the surface so the product can grip. A tip or a form is used to create the extension, and the chosen system is built over the top, either sculpted by hand with acrylic or applied in layers and cured under a UV or LED lamp for gel. The nails are then filed and shaped to your chosen length and style before colour, a top coat or nail art is added. A full new set typically takes one to two hours depending on the system and design. You should feel comfortable throughout. A trained technician keeps the wet product off your skin and cuticles, changes or avoids contaminated files, and uses the correct lamp for the gel being cured. Ask questions as they work, and speak up if anything stings, burns or feels sore, as this is not normal.

Apply cuticle oil daily, and more often if your hands are frequently in water, as this keeps the surrounding skin and the product flexible and less likely to lift. Wear gloves for washing up, cleaning and gardening, since harsh chemicals and prolonged soaking weaken the bond and can lift the extension. Treat your nails as jewels, not tools, so avoid using them to pick, scrape or open things, which is the most common cause of breakage and can tear the natural nail. If an extension lifts, cracks or catches, book in to have it repaired rather than pulling or peeling it off, as this removes layers of your natural nail. Keep to your infill appointments rather than letting the set grow out too far. If you notice redness, swelling, itching, warmth, pus or any tingling around the nails, stop and seek advice, as this can signal infection or an allergy that needs a GP or dermatologist.

The most important safety points are a trained, insured technician and good hygiene throughout. Tools that pierce or touch several clients, such as metal pushers and reusable files, should be properly cleaned and disinfected or single-use, and your technician should work without breaking the skin. Your natural nail should be buffed gently, not aggressively drilled or filed thin, as over-filing is a leading cause of weak, sore, damaged nails. The biggest current UK concern is allergy to the acrylate chemicals, particularly HEMA, in gel and acrylic products. UK dermatologists have warned of a rising number of people becoming sensitised, usually when uncured product touches the skin or gel is under-cured, which is more common with untrained application and cheap home kits. A good technician keeps product off your skin, cures gel fully with the correct lamp, and can offer lower-HEMA or HEMA-free options. Never file over or ignore signs of infection or reaction.

Nail extensions are cosmetic, but some medical situations need care. If you have diabetes, poor circulation, a compromised immune system or a tendency to skin infections, minor damage around the nail can be slower to heal and more prone to infection, so mention this and consider a chat with your GP first. Existing nail or skin conditions such as psoriasis, eczema, fungal infection or damaged, lifting nails may mean extensions are not suitable until things settle. Allergy is the key medical issue: once you are sensitised to acrylates you can react to gel and acrylic products, and because these chemicals are also used in some dental fillings, bone cement and diabetic sensors and pumps, an allergy can complicate future medical care. Symptoms include itching, redness, swelling, tingling or loosening nails, and can appear on the hands, face or eyelids. If you notice any of these, stop treatment and see a GP or dermatologist, who can arrange patch testing. Always tell your technician about relevant conditions and medicines.

A skin patch test is not routine for nail extensions, but a proper consultation and honest history are, and they matter more than many people realise. Your technician should ask about previous reactions to gel, acrylic or other nail products, any skin or nail conditions, and relevant health issues before starting, and record it. This protects you and, under UK liability and insurance rules, protects the technician, since skipping these checks can leave an insured professional found at fault if a client reacts. It is worth knowing that reactions to acrylates tend to build up over repeated exposure rather than appearing on the first set, so a one-off test would not be conclusive. The practical safeguard is a technician who keeps product off your skin, cures gel properly and can offer lower-HEMA or HEMA-free products, plus your own habit of reporting any tingling or itching early. If you have reacted before, get patch testing through a GP or dermatologist before booking.

Be cautious if the salon looks unclean, tools are reused without any disinfection, or the same file is used on client after client. Wet gel or acrylic being smeared onto your skin and cuticles, gel that is barely cured or cured under the wrong lamp, and heavy drilling that leaves your nails feeling hot, thin or sore all raise the risk of damage and allergy. A technician who cannot tell you what products they use, dismisses questions about HEMA or allergies, or has no insurance is a warning sign. During the appointment, burning, stinging or real pain is not normal and should stop the treatment. Afterwards, redness, swelling, warmth, pus, throbbing, spreading itching or any tingling around the nails, or nails that loosen and lift, need prompt attention from a GP or dermatologist.

Good practice starts with a clean, tidy workspace, a technician who washes their hands and uses clean or single-use tools, and files and buffers that are disinfected or fresh for you. A careful professional takes a short history, asks about past reactions and health, and buffs your natural nail gently rather than drilling it thin. They keep wet product off your skin, cure gel fully with the correct matched lamp, and can talk you through the systems they use, including lower-HEMA or HEMA-free options. They are qualified and insured, happy to answer questions, and honest about what suits your nails and lifestyle, tailoring length and shape accordingly. Clear aftercare advice, a sensible infill and removal plan, and a welcoming attitude to you raising any concerns are all signs you are in safe hands.

Are you qualified and insured to carry out nail extensions, and how long have you been doing them?
Which system will you use for me, acrylic, hard gel or BIAB, and why is it the best fit for my nails?
Do the products you use contain HEMA, and can you offer lower-HEMA or HEMA-free options if I am concerned about allergy?
How do you clean and disinfect your tools, and do you use single-use files where possible?
How will you protect my natural nail from over-filing, and how should the set be removed when the time comes?
What aftercare do you recommend, and how often should I come back for infills?

During your appointment nail extensions should feel comfortable. You will notice buffing and filing as a light vibration or pressure, and when acrylic sets or gel cures you may feel a brief warmth. Gel curing under the lamp can sometimes give a short, hot flash, especially with thicker layers, which settles in a few seconds if you take your hand out and go back in. Your nails may feel a little heavier or longer than you are used to for a day or two. What you should not feel is burning, stinging, sharp pain, or soreness around the skin and cuticles. Any of these, or itching and tingling during or after, is a signal to stop and mention it, as it can point to over-filing or an allergic reaction.

There is no downtime with nail extensions and you can use your hands straight away, although it is sensible to avoid knocks and long soaks for the first day while everything settles, especially with acrylic which continues to harden. Your nails may feel slightly different in weight or length at first, and this passes quickly. In most cases there is no soreness at all. If your nails feel tight, sore, throbbing or overly thin after your appointment, that suggests they were over-filed or the fit is too tight, and you should mention it to your technician. Any persistent pain, itching or skin reaction is not normal and should be checked.

A well-applied set of extensions typically lasts around two to four weeks before your natural nail growth shows at the base and an infill is needed. Most people book infills every two to three weeks, where the technician tidies the regrowth and rebalances the shape rather than starting again, which is gentler on your nails and better value. How long a set lasts depends on your nail growth, the system used and how you treat your hands, so daily cuticle oil, gloves for wet or harsh jobs, and not using your nails as tools all make a real difference. When you want them off, have them soaked or gently filed off professionally rather than picking or peeling, which strips the natural nail. It is fine to enjoy extensions long term, and giving your nails an occasional break with good conditioning can help keep them healthy.

Acrylic Nails

Acrylic nails are a hard-wearing nail enhancement made by combining a liquid monomer with a powder polymer, which the technician sculpts over your natural nail or a tip and shapes as it sets. The result is a strong, sculpted extension or overlay that can be filed to almost any length and shape, then finished with polish or gel colour. Acrylics are popular because they are durable, easy to repair and good at adding length to nails that struggle to grow. They are a cosmetic, low-medical-risk treatment, but they are not entirely without concern: the chemicals involved (particularly acrylate and methacrylate monomers such as HEMA) can cause allergic reactions in some people, and poor application or removal can weaken the natural nail underneath. A skilled technician tailors the length, shape, thickness and finish to your lifestyle, so if you work with your hands or want something subtle, say so. Choosing a trained, insured nail technician who works hygienically and keeps uncured product off your skin makes a real difference to both the finish and your long-term nail health. Done well and maintained sensibly, acrylics can look excellent and be worn safely over time.

Service

Acrylic nails

Come to your appointment with clean, product-free nails where possible, and avoid cutting or heavily filing them yourself beforehand. If you have had a reaction to nail products, plasters, hearing aids, dental acrylics or resins in the past, mention it, as this may point to an acrylate or methacrylate sensitivity worth discussing before you commit. Tell your technician about any nail conditions, recent nail infections, psoriasis, eczema around the fingers, or if you are pregnant, as this can affect suitability and comfort. It helps to think in advance about the length and shape you want and how practical that is for your work and daily life, because very long or thin extensions are more prone to catching and lifting. Avoid applying hand cream or oil on the day, since a clean, dry nail plate helps the product bond. If you are prone to allergies generally, ask the salon what products they use and whether a small test area is possible, especially before a first-time application.

Your technician will start by tidying your cuticles and gently buffing the surface of each natural nail so the acrylic can grip. If you are having length added, a tip is glued on or a form is fitted under the free edge to sculpt against. The liquid monomer and powder polymer are then mixed on a small brush and applied bead by bead, shaped and smoothed over the nail. As it cures in the air it hardens, and the technician files and buffs the surface to refine the shape, thickness and finish. A good technician works carefully to keep the wet product off your surrounding skin and cuticles, as skin contact with uncured monomer is a key trigger for allergy. The appointment usually takes around an hour to an hour and a half, longer for intricate shapes or nail art. You may notice filing vibration, a warm sensation and a distinct chemical smell throughout. Colour, gel top coat or nail art is applied at the end and, where a UV or LED lamp is used for gel finishes, your nails are cured under the light.

Once your acrylics are on, treat them as tools' worst enemy rather than tools: avoid using them to pick, prise or peel things, as this stresses the bond and can tear the natural nail. Apply cuticle oil daily to keep the surrounding skin and nail flexible, and use hand cream regularly. Wear gloves for washing up, cleaning and gardening, because prolonged water and harsh chemicals loosen the product and can let moisture sit underneath. If a nail lifts, cracks or catches, book a repair rather than pulling or gluing it yourself, since a gap between the acrylic and nail can trap moisture and lead to infection. Never pick or peel acrylics off, as this pulls away layers of your natural nail. Book professional removal or infills as advised. Watch for any itching, redness, swelling or a rash around the nails or elsewhere on the body, and stop wearing them and seek advice if this appears, as it can signal an acrylate allergy that tends to worsen with repeated exposure.

The most important safety points with acrylics are hygiene, protecting the natural nail and reducing allergy risk. Choose a trained, insured technician who works in a clean environment, disinfects reusable tools between clients and ideally uses single-use files and buffers or sterilises metal implements. Uncured acrylic monomer touching your skin is a recognised trigger for acrylate and methacrylate allergy, so a careful technician keeps the wet product off your cuticles and surrounding skin. Home kits carry a higher risk because instructions and products are often inadequate, curing can be incomplete and skin contact is harder to avoid, so professional application is generally safer. Removal matters as much as application: acrylics should be soaked off or carefully filed down, never picked or ripped, as forced removal strips layers from the nail. If you notice any signs of infection, such as redness, swelling, pus, warmth or throbbing pain around a nail, stop and seek medical advice, as this needs treating rather than covering over.

Acrylic nails are cosmetic and low-risk for most people, but there are genuine medical considerations. The British Association of Dermatologists has repeatedly warned that (meth)acrylate chemicals in acrylic and gel nails are causing a rise in contact allergies, with HEMA being a common culprit. A reaction can show as itching, a red rash, or loosening and lifting of the nail, and the rash can appear away from the fingers, for example on the eyelids, face or neck. Once you develop this allergy it is typically lifelong and can complicate future dental work and surgery, where similar acrylics are used in fillings, bone cement and medical devices, so it is worth taking any reaction seriously. If you have diabetes, poor circulation, a compromised immune system, a nail or skin condition, or any current nail infection, speak to your GP or a qualified practitioner before having acrylics, as healing and infection risk differ. If you are pregnant, acrylics are generally considered fine, but tell your technician and ensure the area is well ventilated. Persistent pain, spreading redness or a suspected allergy should be reviewed by a GP or dermatologist.

A formal skin patch test is not the routine standard for acrylic nails in the way it is for hair or lash dye, but a proper consultation and, where possible, a cautious first application are your best safeguards. Because acrylate and methacrylate allergy is a real and growing issue, it is worth telling your technician about any past reactions to nail products, plasters, resins or dental acrylics, and asking what products they use and whether a small test area or a single trial nail is possible before a full first-time set. This matters for your safety and for UK liability: an insured, professional technician who takes a thorough history and keeps uncured product off your skin is reducing the risk of a claim and of causing a sensitisation that can last for life. A patch or trial area is not fully conclusive, as sensitivity can build up gradually with repeated exposure, so stay alert to any new itching, rash or nail lifting even after wearing acrylics happily before.

Be wary of a salon that reuses files and buffers between clients without disinfection, does not clean or sterilise metal tools, or works in visibly grubby conditions. Uncured acrylic being smeared onto your cuticles and skin, rather than kept neatly on the nail, is poor practice and raises your allergy risk. Pressure to have extreme length or thickness against your wishes, no interest in your medical or allergy history, and dismissing questions about products are all warning signs. Removal by forcibly prising, ripping or pulling acrylics off, rather than soaking or careful filing, will damage your nails and should not happen. During wear, redness, swelling, pus, warmth, throbbing pain, a spreading rash, or nails lifting and loosening are red flags that mean you should stop and seek advice rather than reapply over the top.

Good practice looks like a clean, well-ventilated space, a technician who washes their hands, uses single-use files or properly sterilises reusable tools, and often wears nitrile gloves. They will ask about your nail health, any allergies and past reactions before starting, and take care to keep the wet acrylic off your skin and cuticles. A skilled technician talks you through length, shape and thickness options and tailors them to your lifestyle rather than pushing one style. They apply thin, well-shaped layers, avoid over-filing your natural nail, and explain aftercare and when to return for infills. Professional, gentle removal by soaking or careful reduction, honest advice about giving nails a rest when needed, insurance, and a willingness to answer questions about the products they use are all signs you are in safe hands.

Are you trained and insured to apply acrylic nails, and how do you keep your tools clean between clients?
Which acrylic products do you use, and do they contain HEMA or other acrylates I should know about if I am prone to allergies?
Can we do a small test area or a single trial nail first, as this is my first time or I have reacted to nail products before?
How do you keep the uncured product off my skin and cuticles to reduce the risk of an allergic reaction?
How will you remove or infill these, and how do you avoid damaging my natural nails?
What length and shape would you recommend for my nails and lifestyle, and how often will I need infills?

During application you will usually feel gentle pressure and buffing on the nail surface, and the filing tool can create a warm, slightly ticklish vibration, especially near the cuticle. The acrylic itself has a strong chemical smell that many people find distinctive but which should not sting your eyes or throat in a well-ventilated space. As the product cures you may notice a mild warmth. None of this should be painful. Sharp pain, burning, heat that becomes uncomfortable, or filing that feels like it is thinning your nail too far are not normal and you should ask the technician to stop. After the appointment your nails may feel slightly heavier or longer than you are used to, which quickly becomes familiar.

There is no downtime with acrylic nails and you can use your hands straight away, though it is sensible to be gentle for the first day while the product fully settles. Most people simply get used to the added length and thickness. If you have worn acrylics for a long time, your natural nails may look thinner, drier or slightly rough once removed; this is usually surface damage that grows out over a few months with regular oil, hand cream and gentle care. Giving your nails an occasional break can help them recover, and any persistent pain, discolouration or lifting of the natural nail deserves a proper look by a professional or GP.

Acrylic nails typically last around two to three weeks before you will see regrowth at the base and may want an infill, where fresh product fills the gap and rebalances the nail. With regular infills, a set can be maintained for a long time, though many people choose to soak them off and rest their nails periodically. The finish stays hard and glossy, and colour or gel top coats can be changed at infill appointments. To keep them looking their best, apply cuticle oil daily, wear gloves for wet or harsh tasks and avoid using your nails as tools, as knocks and prising cause lifting and cracks. Booking timely infills rather than letting nails grow out too far reduces leverage on the natural nail and the chance of breakage. When you are ready to stop, have them professionally removed and follow up with oil, hand cream and gentle care while any surface dryness or thinning grows out. Honest upkeep like this protects both the look and your natural nail health.

Builder in a Bottle (BIAB)

BIAB, short for Builder in a Bottle, is a soak-off builder gel applied over your natural nails and cured under a UV or LED lamp. It sits somewhere between a standard gel polish and hard acrylic or gel extensions: thicker and stronger than ordinary gel, but still flexible and designed to be soaked off rather than drilled away. Many people choose BIAB as an overlay to add strength and length to their own nails, or with a subtle apex to support weaker, bendy nails while they grow. It is popular because it typically lasts longer than regular gel polish and, when applied and removed correctly by a trained technician, is one of the gentler ways to keep a durable, glossy finish. BIAB is a cosmetic nail treatment, not a medical or health treatment, and it will not fix an underlying nail condition. A good technician will assess the health of your natural nails first, tailor the thickness, apex and length to how you use your hands, and talk you through colour, shape and upkeep so the result suits your lifestyle rather than a one-size-fits-all set.

Turn up with clean, product-free nails where possible, and avoid using heavy hand creams or cuticle oils on the day, as residue can stop the gel bonding properly. If you still have BIAB or gel on from a previous set, most salons prefer to soak this off themselves rather than have you pick or peel it, which can strip layers of natural nail. Let your technician know if you have had any reaction to gel, acrylic or nail products before, if you are pregnant, or if you have any skin conditions, cuts or infections around the nails, as these may affect whether the treatment goes ahead. It helps to think in advance about the length, shape and finish you want and how you use your hands day to day, since a nail-biter, a gardener and someone at a keyboard all suit slightly different builds. Come with realistic expectations: BIAB strengthens and protects, but it cannot rescue very damaged or infected nails, which need time or a GP first.

Your technician will start by tidying the cuticles and gently buffing the surface of each nail so the gel can grip, using light buffing rather than aggressive filing or heavy drilling. A dehydrator and bonding base may be applied, then the builder gel is painted on in thin layers, sometimes with a slightly raised apex in the centre for strength. Each layer is cured under a UV or LED lamp for a set time; you will place your hand under the lamp and feel it switch on. Occasionally the gel can give a brief warm or hot flash during curing, especially on thin or damaged nails, and you can lift your hand out for a second if it feels too warm. Colour, a top coat and any nail art are added and cured last, then the sticky layer is wiped away and cuticle oil applied. A full set usually takes around an hour to an hour and a half. A careful technician keeps the product off your surrounding skin, as uncured gel on the skin is what tends to trigger allergies over time.

For the first day or so, try to avoid long soaks in very hot water, saunas and harsh cleaning chemicals, which can loosen the edges. Wearing gloves for washing up, cleaning and gardening protects the seal and your natural nails underneath. Apply cuticle oil daily once any tenderness has settled; this keeps the nail and skin supple and can help the gel last longer and lift less. Treat your nails as tools' worst enemy rather than tools themselves: do not use them to pick, peel or lever things open, and avoid biting or picking at any lifting, as this pulls away layers of your own nail. If an edge does lift or a nail chips, book in for a repair rather than pulling it off. Most sets are designed for infills every two to four weeks; going much longer can lead to growth, lifting and snagging. If you notice any redness, itching, swelling or lifting of the skin around the nail after a set, stop and contact your technician or GP, as this can signal an acrylate allergy.

Choose a trained, insured nail technician working in a clean, well-ventilated space, with tools that are either single-use or properly sanitised and sterilised between clients. In the UK, reputable technicians typically hold recognised nail qualifications, carry public liability insurance and follow COSHH rules for the products they use, keeping safety data sheets available. Good hygiene matters because shared, poorly cleaned files and cuticle tools can spread infection. The bigger long-term risk with any builder gel is acrylate allergy, which tends to develop when uncured gel repeatedly touches the skin, or from home kits and cheap lamps that do not cure the product properly. A careful technician keeps product off your skin, cures for the correct time with a matched lamp, and buffs gently rather than drilling into the natural nail. If you have very thin, damaged, sore or infected nails, a responsible technician will pause and suggest you let them recover, or see a GP, before applying more product.

BIAB is a cosmetic treatment and is not suitable for treating any nail or skin condition. Tell your technician if you have psoriasis, eczema, fungal or bacterial nail infections, diabetes, poor circulation, or a history of allergy to nail products, adhesives, or medical dressings, as any of these can affect suitability and healing. If you are pregnant or breastfeeding, BIAB is generally considered low risk, but many people prefer well-ventilated salons and HEMA-free options as a precaution; there is no strong evidence of harm, and your midwife or GP can advise. People who have reacted to gel or acrylic before should be especially cautious, as acrylate allergies are usually lifelong and can spread to other products, including some dental and medical adhesives. BIAB cannot diagnose or cure anything, so any persistent nail changes, discolouration, pain, lifting from the nail bed or suspected infection should be seen by a GP or pharmacist rather than covered with more gel. If a reaction develops, stop treatment and seek medical advice.

A skin patch test is not yet routine across the whole industry for BIAB, but it is increasingly offered and is sensible if you have never had gel before or have reacted to nail products, adhesives or hair dye in the past. Because the main risk is an acrylate allergy such as to HEMA, a small amount of product can be applied and cured on the skin, usually on the inner arm, 24 to 48 hours ahead so any redness, itching or swelling shows up before a full set. Just as important is a proper consultation and contraindication check: your technician should ask about allergies, skin and nail conditions, pregnancy and previous reactions, and inspect your nails for infection or damage. This protects you and reduces the technician's liability, since in the UK an insured practitioner who skips these checks can be found at fault if a client reacts. A patch test lowers risk but is not fully conclusive, as sensitivity can build over repeated exposure.

Be wary if the technician cannot show training or insurance, reuses files and cuticle tools without cleaning or sterilising them, or works in a dirty or cramped space. Heavy drilling into your natural nail, aggressive filing that leaves nails thin, sore or bleeding, or product smeared onto your skin and cuticles are all warning signs, as skin contact with uncured gel is what drives allergies. A lamp that does not match the gel brand, rushed curing, or gel that stays tacky or lifts within days suggests poor technique or unsafe home-grade kit. Prices that seem too good to be true often mean corners cut on hygiene or product quality. During the set, a nail that burns rather than briefly warms, or ongoing pain afterwards, should not be ignored. Any redness, itching, swelling or blistering around the nails after treatment is a red flag for an acrylate allergy and needs stopping and checking.

Good practice looks like a thorough consultation, a technician who asks about your health, allergies and how you use your hands, and honest advice about whether BIAB suits your nails right now. Look for a clean, tidy station, single-use or properly sterilised tools, and hand sanitising before they start. A skilled technician buffs gently rather than drilling, keeps product off your skin, applies thin cured layers, and uses a lamp matched to the gel. They should explain aftercare, realistic wear time and infill timing, and offer HEMA-free options if you are sensitive or prefer them. Visible qualifications, public liability insurance and a willingness to patch test on request are strong signs. A trustworthy technician sets honest expectations, will happily tailor length, shape and thickness to you, and is comfortable saying no or pausing if your nails need to recover first.

What training and qualifications do you hold, and are you insured for BIAB?
How do you clean and sterilise your tools between clients?
Does your gel contain HEMA, and do you offer a HEMA-free option if I am prone to allergies?
Can I have a patch test first, especially as I have reacted to nail or beauty products before?
How will you prepare my natural nails, and do you buff gently rather than drill?
How often will I need infills, and how will you remove the BIAB safely without damaging my nails?

BIAB itself is generally comfortable and most people feel nothing more than the light pressure of buffing and the brush moving over the nail. The sensation people notice most is the curing stage: as the gel sets under the lamp, some feel a brief warm or occasionally hot flash, especially on thin, short or previously damaged nails or when a thicker layer is curing. This heat spike usually lasts only a few seconds, and you can lift your hand out of the lamp for a moment to let it ease before putting it back. You may feel a slight tightness or awareness of the nails for a short time afterwards. Sharp or lasting pain, burning that does not settle, or throbbing around a nail is not normal and should be mentioned, as it can point to over-curing or over-filing.

There is no real downtime with BIAB, and you can go straight back to your day once the set is finished and fully cured. Your nails are safe to use gently right away, though they are at their most vulnerable in the first 24 hours while everything settles, so it is worth being a little careful with knocks, hot water and heavy cleaning. Some people notice mild sensitivity or a slightly tight feeling for a short while, particularly if their natural nails were thin or over-buffed. This normally passes quickly. Any lasting soreness, throbbing, redness or heat around a nail is not typical and should be checked, as it can point to a reaction, a burn from over-curing, or an infection.

With good application and care, BIAB typically lasts around two to four weeks before you need infills, though this varies with how fast your nails grow and how hard you are on your hands. Rather than being taken off completely each time, BIAB is often maintained by soaking or buffing back the regrowth and rebalancing the apex, which is gentler on your natural nail than a full removal every visit. When it does need removing, it should be soaked off in acetone and gently eased away, never picked or peeled, as forcing it strips layers of your own nail and leaves it thin and weak. Daily cuticle oil, gloves for wet or dirty work, and not using your nails as tools all help a set last longer and lift less. The finish, length, shape and colour can all be tailored to what you want, from a barely-there natural overlay to longer, bolder nails, and your technician can adjust the build to match how you live day to day.