Is gel polish safe? Lamps, allergies and nail thinning

Gel polish is worn by a great many people without trouble, but it is reasonable to ask what you are putting on your nails and under the lamp. Three concerns come up most often: the curing lamp, allergic reactions, and damage to the nail itself. Here is what is generally understood about each, what remains uncertain, and what you can do to keep the risks small.

The curing lamp

Gel hardens under a lamp that emits ultraviolet light, whether it is described as UV or LED. The difference between the two is mostly in how the light is produced and how quickly the gel sets; an LED nail lamp still works by giving off ultraviolet light, mainly UVA, in the range the gel is designed to react to. So it is fair to think of every gel cure as a small dose of UV to the hands.

Each session is short and the exposure is limited to your hands, but research into its long-term effects is ongoing rather than settled. Laboratory work has raised questions, and studies in people are limited. Dermatologists generally regard the risk from occasional manicures as low, while acknowledging that it is not zero, and it adds to the UV your hands already get from daylight.

Reducing lamp exposure

If you would like to reduce exposure, some people choose to:

• Apply a broad-spectrum sunscreen to the backs of the hands before the appointment, keeping it off the nails themselves so it does not affect adhesion.
• Wear fingerless gloves that cover the hands and leave only the nails exposed under the lamp. Dark, close-fitting fabric blocks more light than thin pale cotton.
• Space out gel manicures or alternate with classic polish.
• Avoid unnecessary re-curing. Each coat needs its cure, but at home there is no reason to keep hands under a lamp for longer than the gel requires.

Who should ask a doctor first

If you have a history of skin cancer, photosensitivity, or take medication that makes your skin more sensitive to light, ask your doctor before having gel applied. Some antibiotics, acne treatments and other medicines carry that warning, and the leaflet that comes with them will usually say so. The same applies if you are having treatment that affects your skin or nails. Classic polish needs no lamp at all and is a simple alternative while you find out.

Gel allergy and HEMA sensitisation

Gel products contain acrylates, and one of the most common, HEMA, can cause allergic contact dermatitis. Sensitisation usually happens when uncured gel touches the skin, repeatedly, over time. The first few contacts may cause nothing at all; the immune system becomes primed, and later contact triggers a reaction. That is one reason careful application keeps product off the cuticles and sidewalls.

Several things make sensitisation more likely:

• Gel on the skin. Every flood onto the cuticle or sidewall is direct contact with uncured product.
• Under-cured gel. Gel that has not fully hardened leaves reactive material in contact with the nail and nearby skin. Thick coats and a lamp not matched to the product both contribute.
• Handling sticky residue. Some gels leave a tacky layer after curing. Touching it, then your face, transfers it.
• Frequent home kits used without training. Most of these risks are easier to avoid with practice and the right equipment.

Signs of a reaction can include itching, redness, swelling or small blisters around the nails or on the fingertips, sometimes on the face, eyelids or neck where you touch them. Nails may also loosen from the nail bed. Symptoms often appear a day or two after the appointment rather than during it, which is why the connection is easy to miss.

If you think you are reacting

1. Stop having gel applied, including top coats and builder gels, which contain similar ingredients.
2. Have the existing gel removed gently, without peeling.
3. See a dermatologist. Patch testing can confirm the allergy and identify which ingredients to avoid.
4. Tell your dentist and doctor if you are diagnosed. Once you are sensitised it is usually lasting, and it can matter beyond nails, because acrylates are also used in some dental and medical materials.

If the reaction is severe, spreading or affects your breathing or eyes, seek medical help promptly.

Nail thinning

Gel itself does not thin nails. Removal does, when it is rushed. The two common culprits are heavy filing down to the nail and peeling gel off, which lifts away the top layers of the nail plate with it. Nails that feel thin, bendy or sore after removal have usually been over-filed or peeled. White patches on the surface after removal are often dehydration from acetone and fade within days, but rough, flaking patches are lost layers that have to grow out.

To protect your nails:

1. Never peel or pick gel off.
2. Have it removed properly, or follow a careful method at home. See how to remove gel polish at home.
3. Use cuticle oil daily between appointments to keep the nail and surrounding skin flexible.
4. Take a break if your nails are already damaged, and let them grow out. How to strengthen weak, peeling nails covers the recovery.

Hygiene

Clean tools matter as much as the product. Here, metal tools are sterilised between every guest, and files and buffers are single-use. Wherever you go, it is reasonable to ask how tools are cleaned; what good nail salon hygiene looks like explains what to look for.

Questions people ask

Is LED safer than UV? Both cure gel with ultraviolet light. LED lamps tend to cure faster, which can mean shorter exposure, but the same precautions apply to either.

Can I wear gel while pregnant? There is little specific research. Many people continue, but if you have concerns, ask your midwife or doctor, and good ventilation and keeping product off the skin are sensible either way.

If I react to gel, can I still wear classic polish? Often, yes, because classic polish works differently. A dermatologist can advise after patch testing.

Do nails need to “breathe” between sets? Nails do not breathe; they get oxygen from the blood supply. A break helps if your nails are damaged, not because the gel suffocates them.

Gel kits at home

Home gel kits are widely available, and they are where many of the avoidable problems begin. Without practice it is easy to flood gel onto the skin, apply coats too thickly or use a lamp that does not fully cure the particular gel in the kit. Each of those raises the chance of sensitisation, and the reaction, once it develops, applies to gel wherever you have it done. If you do use a kit, keep every coat thin and off the skin, cure each one fully with the lamp intended for that product, never touch uncured gel, and remove it by soaking rather than peeling.

A safety checklist

• Sunscreen on the backs of the hands, or fingerless gloves, under the lamp.
• Ask your doctor first if you are light-sensitive or have had skin cancer.
• Gel kept off the cuticles and sidewalls.
• Itching, redness or blisters: stop gel and see a dermatologist.
• Removal by soaking, never peeling or heavy filing.
• Cuticle oil daily, and a break if your nails are damaged.

The short answer

For most people, gel polish applied carefully and removed gently is a reasonable choice. Keep product off the skin, take reactions seriously, and look after the nail between sets. If gel is not for you, classic polish is always an option; gel versus regular polish compares the two.

Have a question about your nails before you book? Ask at the chair when you choose a manicure.