Gel looks great for weeks, but the chemicals, lamps and shared tools deserve a little scrutiny. Work through this checklist before you book your next appointment.

Quick look

1. In one survey of over 2,000 women, 48.3% reported side effects during gel application and more than 75% after removal.
2. Metal tools should be washed and steam sterilised, and wooden files and buffers should be single use.
3. UV nail lamps typically use 290 to 450 nm UVA light for 6 to 10 minutes per session, and sunscreen applied 30 minutes before has been recommended.
4. Uncured gel touching the skin, not properly cured gel on the nail, is what usually triggers acrylate allergies such as HEMA sensitivity.
5. Special treatment premises may need a licence from the local council, and requirements vary, so check with your council before booking.

A gel manicure promises weeks of chip-free colour, but it also involves reactive chemicals, a UV lamp and tools that have touched every client before you. In one survey of more than 2,000 women, 48.3% reported side effects while gel polish was being applied, roughly 20% while wearing it and more than 75% after removing it. Those numbers are not a reason to avoid gel altogether, but they are a good reason to choose your salon with care. Run through this checklist before you book.

Check Hygiene Before You Check In

Use your eyes before you use your debit card, ideally on a walk-in visit so you can look around without an appointment looming.

• Assess the whole salon. Look at the floors, workstations and bathroom. If surfaces are neglected, the equipment probably is too.
• Watch the hand washing. Your nail tech should wash their hands before starting and should be happy for you to do the same.
• Look for fresh files. Wooden and abrasive files cannot be sterilised, so a careful salon uses a new one for each client.
• Sniff the air. An overwhelming smell of fumes or chemicals points to poor ventilation, which is bad news for you and for the staff.
• Ask about licensing. Premises offering special treatments may need a licence from the local council, and therapists carrying out those treatments may also need to register. The rules vary by area, so check your own council’s website for what applies near you.

Questions to Ask About Tools and Sterilisation

A well-run salon will answer these without hesitation, so treat any waffle as an answer in itself.

• How are metal tools sterilised? A quick wipe with alcohol does not do the job. Instruments should be washed and then treated with steam to sanitise them.
• Can I see the process? Many salons seal tools in sterilisation pouches and open them in front of you. Asking to watch is entirely reasonable.
• What counts as single use? Wooden sticks, buffers and files should be fresh for every client and never reused.
• Which products do you use? Cosmetic products sold in the UK must comply with the UK Cosmetics Regulation, and TPO, a gel nail ingredient, is banned in the EU and GB. Legitimate UK stock should be compliant.

Lamp Safety and the Curing Process

Curing hardens liquid gel using ultraviolet light, typically in the 290 to 450 nm UVA range, and a session usually involves 6 to 10 minutes under the lamp, repeated every 2 to 3 weeks. Research suggests the risk of skin cancer from exposures of up to 4 minutes per session is low, and applying sunscreen at least 30 minutes before treatment has been recommended to cut cumulative UVA exposure. For the gel itself, good technique matters as much as the lamp.

• Ask whether the lamp matches the gel system. The wrong lamp, or a curing time cut short, leaves gel under-cured.
• Watch the layer thickness. Gel applied too thickly to set fully leaves reactive chemicals sitting on the surface.
• Keep raw gel off your skin. Properly cured gel on the nail plate is stable; liquid gel brushing onto the surrounding skin is what causes trouble.

Little trick: Pop a broad-spectrum sunscreen on your hands about half an hour before your appointment to reduce the UVA your skin picks up under the lamp.

Patch Tests and Allergy Warning Signs

Allergic contact dermatitis works in two stages. The first contact with an allergen sensitises your skin without any visible reaction, and it is the next exposure that brings redness and itching. Nail varnish hardeners, preservatives and fragrances are all common cosmetic allergens, and metals such as nickel in jewellery are on the same list, which our guide to jewellery for sensitive skin explains in more detail. Gel systems add acrylates to the mix: one study found around 2.4% of people tested positive for (meth)acrylate allergy, and the best-known culprit, HEMA, is found in most traditional gel products. Exposure is cumulative, building quietly over many manicures.

• Ask about patch testing if you are trying a new salon or a new product range for the first time.
• Know the signs. Itching, redness, swelling or blistering around the nail beds in the days after a manicure suggests a reaction, not ordinary dryness.
• Do not assume a problem nail is fungus. Dermatologists regularly see nail problems caused by gel allergies that patients mistake for infection, and getting the diagnosis right needs a professional.
• Remember cross-reactivity. Once you react to one acrylate, your skin can react to related ones, so the allergy does not disappear by switching brands.

The two-stage nature of skin sensitisation is the same reason the skin test before hair colouring matters every single time, as our guide to hair dye allergies covers.

What Safe Removal Should Look Like, and When to Walk Away

The survey figures tell their own story: nail plate changes were significantly more common after removing gel polish than during application or wearing, and rates were linked to whether a professional or a non-professional did the procedure. Removal is where most damage happens.

• Expect soaking, not force. Gel should be softened with acetone and gently eased off with a wooden stick.
• Stop the digging. A tech who scrapes or digs under the nail is doing harm and there is no benefit to it, so speak up.
• Question the drill. Aggressive filing of the natural nail surface is a warning sign that the plate is being thinned.
• Walk away from peeling. Ripping or peeling gel off takes layers of your nail plate with it.

Aftercare Between Appointments

• Protect your hands from wet work. Frequent contact with soap and water is a common irritant, so gloves for washing up and hand cream afterwards help the skin around your nails stay comfortable.
• Keep watching between visits. Around 20% of women reported side effects while wearing gel, so check the skin around your nails now and then.
• Leave a gap before rebooking. Because problems peak after removal, letting nails recover for a while between appointments is a sensible habit.
• Get a wrong-looking nail checked. Discolouration, thickening or lifting deserves a pharmacist, GP or dermatologist rather than another coat of gel.
• Consider alternating. If you switch to polish or bare nails between salon gels, our 7 ways to make a home manicure last longer will keep things looking tidy in the meantime.

Ask away

How often is it safe to have a gel manicure?

Gel sessions are typically repeated every 2 to 3 weeks, but side effects in research were most common after removal, so leaving a break between appointments gives your nails time to recover.

Can you be allergic to gel nail polish?

Yes. One study found around 2.4% of people tested positive for (meth)acrylate allergies, which gel products contain. The trigger is usually raw, uncured gel touching the skin, and once an allergy develops it tends to be permanent.

Do gel manicures damage your nails?

The damage usually happens at removal. In a survey, more than 75% of women reported side effects after taking gel off, so gentle soaking and a wooden stick, rather than forceful scraping, matters most.

Do UK nail salons need a licence?

Premises offering massage or other special treatments may need a licence from their local council, and employed therapists may need to register too. Rules vary by area, so contact your council to check what applies.