Phenolic Nail Ablation
Reviewed by Andrew Schox, BSc(Hons) PGradDipPod MPod, October 2026
Phenolic nail ablation is a minor operation on the toe, done by a podiatrist or other trained professional under local anaesthetic. Part or all of a problem toenail is removed, then liquid phenol is applied to the area where the nail grows from, so the treated nail should not grow back. It is mainly used for moderate to severe ingrown toenails. It is not suitable in pregnancy. Regrowth is low, about 1 to 3 per cent in reported series. Healing takes about 4 to 6 weeks if part of the nail is removed and 10 to 12 weeks if the whole nail is removed.
What is it?
Phenolic nail ablation is a type of nail surgery. Your toe is numbed with a local anaesthetic, and part or all of the problem toenail is removed. Liquid phenol is then applied to the nail bed and the nail matrix (the area under the skin where the nail grows from).
Phenol is a chemical that burns and destroys the cells that make new nail. This is why the treated part of the nail should not grow back. Because phenol is hazardous, this treatment is meant for suitably qualified professionals, such as podiatrists.
You may hear it called phenolisation, phenol matricectomy or chemical matrixectomy. All of these mean the same thing. You and your podiatrist can also talk about whether you want the nail removed permanently or left able to grow back, and this should be decided before the surgery.
What is it used for?
The main use is an ingrown toenail, especially a moderate to severe one (often called stage 2 or stage 3). This is when the edge of the nail digs into the skin beside it, causing pain, swelling and sometimes infection. Surgery is normally the treatment of choice for a sudden (acute) ingrown toenail, or for repeated infection from curved (involuted) nails, as long as there is no medical, psychological or social reason to avoid it.
For a mild (stage 1) ingrown toenail, simpler care is usually enough. For a mild one, you can soak your foot in warm salty water and use paracetamol or ibuprofen for pain. Don't cut the nail (let it grow out), and don't pick at the toe or nail. If home care isn't helping, see a podiatrist or GP to talk about whether nail surgery suits you.
Nail removal with a chemical is also described for thickened, deformed or curved nails that routine care in the clinic can't fix. It isn't yet clear how well phenol works for these nails compared with ingrown toenails.
In children with moderate to severe ingrown toenails, chemical nail surgery has worked better in the long term than simpler measures such as taping, cotton pledgets (small cotton pads) and nail bracing. Those simpler measures had the problem come back in about 5 to 23 per cent of children.
Is it right for me?
It often suits people with a moderate to severe ingrown toenail, or repeated infection from curved nails. Your podiatrist will ask about your health, your medicines and your allergies before going ahead.
Who shouldn't have it
- Pregnancy. Phenol can harm an unborn baby, so it is not used in pregnancy. Pregnant people are also advised not to come into the treatment room with someone having the procedure, because of the fumes.
- A past allergic reaction to local anaesthetic. A reaction like this is likely to happen again, so the anaesthetic can't be given.
Tell your podiatrist if:
- you are pregnant, might be pregnant or are breastfeeding, so they can discuss your options and change the procedure if needed
- you have diabetes, foot ulcers or poor circulation
- you have a bleeding disorder or take blood thinners (anticoagulants)
- the toe already looks infected
These don't always rule it out, but each needs an individual decision. If you have diabetes, your podiatrist may ask how well your blood glucose is controlled, and may suggest waiting until it is better controlled, because high glucose slows healing and raises the risk of infection. Children can have it too, and the treating clinician makes that decision.
What happens?
It is usually done as a single procedure. First, the local anaesthetic is injected into the base of your toe. It takes about 10 to 15 minutes to go numb, and sometimes longer. You may still feel pressure and movement, but you shouldn't feel pain.
A small rubber ring (tourniquet) is placed on the toe to limit bleeding. The problem nail, or part of it, is removed. Phenol is then applied to the nail matrix for a set time, and the area may be rinsed afterwards. The tourniquet is taken off and your toe is dressed with a pressure bandage.
The phenol used is a strong liquid, around 88 to 89 per cent. How long it stays on varies between clinics, from about 1 minute to 4 minutes. A shorter time may mean faster healing, but it may also mean a higher chance of regrowth. No single time is agreed.
Some podiatrists also scrape away the treated tissue (curettage). This can shorten healing by about a third, but it may cause more bleeding afterwards.
You will go home with a large dressing, so bring roomy footwear. Remove any nail varnish before your appointment. Ask how the phenol will be applied and for how long, and ask for written aftercare instructions.
How well does it work?
Phenol lowers the chance of the nail problem coming back. After surgery alone, an ingrown toenail came back in about 41 in 100 people. With phenol added, it came back in about 14 in 100. Reported series of people treated with phenol show the problem returning in about 1 to 3 per cent. These figures come from different groups of people and different ways of measuring, so treat them as approximate.
In one trial, phenol and another operation called aesthetic reconstruction had a similar chance of the problem returning. Phenol is often described as the simplest, safest option with a low chance of the problem returning, and it is the preferred chemical method for moderate to severe ingrown toenails. Ask your podiatrist why they recommend it for your toe and what the chance of it coming back is. If your ingrown toenail is mild, ask about simpler care first.
Risks and side effects
Most people do well, but no surgery is without risk. Possible problems include:
- Pain. This is the most common problem after nail surgery. It is more likely if the toe was already infected.
- Infection. This can happen even with careful technique. You may need antibiotics from your GP.
- Skin burning and blistering. This happens occasionally and usually settles in a few days.
- Regrowth of the nail. Some of the treated nail may grow back.
- Slower healing. This is more likely after the whole nail is removed than after part of it.
- Allergic reaction. A reaction to the local anaesthetic or the phenol is rare, at fewer than 1 person in every 10,000.
If your ingrown toenail has been there a long time, your podiatrist may check for infection in the bone and treat it with antibiotics.
Afterwards
Healing takes time. On average it takes about 4 to 6 weeks if part of the nail is removed and 10 to 12 weeks if the whole nail is removed. Healing can feel slow, partly because of the effect of the phenol on the tissues, even when you follow all the advice.
Follow your podiatrist's written instructions for dressings. Different dressings and creams after surgery made no clear difference to infection, pain or healing time. If you smoke, tell your podiatrist, because smokers healed more slowly in a trial.
Check your toe each day for signs of infection. Keep the contact number for your podiatry or surgical team handy before you leave the clinic, and go to any follow-up checks.
When to see a podiatrist
Book an appointment if
You have an ingrown toenail that is painful, swollen or not improving with home care. Book too if you want to talk about nail surgery, or if you are pregnant, might be pregnant, breastfeeding, have diabetes, poor circulation, a bleeding disorder, take blood thinners or have had a reaction to local anaesthetic, so your podiatrist can plan around it.
Seek prompt assessment if
See someone promptly if an ingrown toenail is getting more painful, swollen or infected. After surgery, contact your podiatry team, GP or out-of-hours service without delay, and don't wait for it to settle, if you have a sudden increase in pain, more redness or swelling, redness tracking up the toe, foot or leg, a bad smell, smelly or increased leakage or bleeding, or flu-like symptoms. If you have a foot wound or infection and also have confusion or slurred speech, severe shivering, extreme muscle pain, little or no urine, severe breathlessness, mottled or discoloured skin, or a feeling that you might die, this could be sepsis, a life-threatening emergency. Call your local emergency number for an ambulance.
Frequently asked questions
Does the procedure hurt?
The injection of local anaesthetic at the base of your toe can sting. It takes about 10 to 15 minutes to go numb, sometimes longer. You may still feel pressure and movement during the procedure, but you shouldn't feel pain. Pain afterwards is the most common problem, so ask your podiatrist how to manage it.
Will I need antibiotics?
Not always. If you have a moderate to severe ingrown toenail and no other risk factors, the procedure can be done without antibiotics. If your ingrown toenail has been there a long time, your podiatrist may check for infection in the bone and prescribe antibiotics. Your podiatrist will advise what suits you.
Will I need more than one session?
It is usually described as a single procedure. If the nail starts to grow back or the problem returns, see your podiatrist, who can talk through what to do next.
Is it better to remove part of the nail or the whole nail?
It depends on your toe and what you and your podiatrist decide together. Healing is quicker after partial removal, about 4 to 6 weeks, compared with 10 to 12 weeks for the whole nail. Ask which option your podiatrist recommends for your toe and why.