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Health condition · Clinically reviewed

Ingrown toenails, Heifetz staging, conservative care and definitive nail surgery.

A common, treatable problem. Most stage 1 cases settle with soaks and straight cutting - the rest deserve partial nail avulsion with phenolisation, not another antibiotic course.

Looking for the singular variant? See our guide to ingrown toenail - or the hyphenated form ingrown toe-nails.

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Why trust this guide

  • 01

    Clinically reviewed

    Written by our editorial team and reviewed by a registered UK clinician before publication.

  • 02

    Sourced from guidance

    Checked against NICE CKS, Royal College of Podiatry and peer-reviewed sources you can see at the end.

  • 03

    Current for 2026

    Reflects modern UK practice including partial nail avulsion with phenolisation as the preferred definitive treatment.

Key facts

Ingrown toenails at a glance.

The essentials, in plain English - what it is, how it is graded and how it is treated in UK practice today.

  • What it is

    Onychocryptosis - a nail edge, most often the great toe, that pierces or presses into the surrounding nail fold and drives inflammation, pain and sometimes infection.

  • How it is graded

    The Heifetz classification splits it into three stages - stage 1 inflammation, stage 2 infection and drainage, stage 3 granulation and chronic hypertrophy.

  • Why it happens

    Curved cutting of the nail, tight footwear, sweaty feet, trauma and inherited nail shape combine to push a spicule into the fold.

  • Conservative first

    Warm salt-water soaks, a cotton wisp under the corner, straight cutting and roomier shoes settle most stage 1 problems within a fortnight.

  • Definitive fix

    Partial nail avulsion with phenolisation is the preferred UK procedure - a small strip of nail is removed and the matrix chemically ablated to prevent regrowth.

  • Related plural page

    This guide is the plural counterpart to our singular guide at /conditions/ingrown-toenail/ - the two are cross-linked and use consistent guidance.

Why this guide matters

A short conservative trial, then a definitive fix.

Ingrown toenails respond to a small ladder. Get the first rungs right and most cases settle. When they do not, one small procedure ends the problem.

  • Conservative care is the first line

    Warm salt-water soaks, cotton wisping and straight-across cutting settle most stage 1 cases in a fortnight.

  • Antibiotics do not fix the mechanics

    They have a role for cellulitis but rarely on their own - the offending nail spicule needs addressing too.

  • Phenolisation is the durable answer

    Partial nail avulsion with phenolisation succeeds in over 95% of cases and is well tolerated under local anaesthetic.

How the diagnosis is made

From first flare to a clear plan.

The steps a UK GP or podiatrist will normally follow, in order - so you know what to expect and why.

  1. 01

    Assessing

    History and lifestyle review

    Cutting habits, footwear, sport, diabetes and vascular risk - the story usually points straight at the cause.

  2. 02

    Assessing

    Toe examination and staging

    The clinician looks at the fold for redness, swelling, discharge and granulation and assigns a Heifetz stage.

  3. 03

    Assessing

    Vascular and neurological check

    Pulses, capillary refill and sensation are checked - especially in diabetes, peripheral arterial disease and neuropathy.

  4. 04

    Confirming

    Swab if frankly infected

    A wound swab is only taken when there is spreading cellulitis, purulent discharge or a poor response to first-line care.

  5. 05

    Confirming

    Rule out mimics

    Subungual exostosis, onychomycosis, paronychia and periungual warts can all masquerade as an ingrown toenail.

  6. 06

    Preparing

    Podiatry or GP referral

    Stage 2 and 3 disease, recurrence, or any high-risk foot deserves a specialist podiatry opinion for definitive treatment.

  7. 07

    Preparing

    Consent for nail surgery

    If surgery is planned the podiatrist walks through partial nail avulsion, phenolisation, aftercare and the small risk of regrowth.

Typical timeline: a first visit to a settled foot in days, and a definitive procedure within weeks if needed.

Symptoms

What ingrown toenails actually look like.

The Heifetz stages mapped onto everyday signs - and the features that mean it is time to escalate to podiatry.

  • Pain along the nail edge

    A sharp, focal pain at the corner of the great toe, worse with pressure from shoes or bedding.

  • Redness and swelling of the fold

    Heifetz stage 1 - a warm, tender, swollen nail fold without frank pus. Most settle with conservative care.

  • Discharge and infection

    Heifetz stage 2 - purulent or serous discharge, sometimes with cellulitis spreading along the toe.

  • Granulation tissue

    Heifetz stage 3 - fleshy overgrowth of the fold with chronic bleeding and a hypertrophied lip that will not settle without surgery.

  • Recurrent episodes

    Repeat flares in the same nail edge - a strong steer towards definitive nail surgery rather than more conservative rounds.

  • Sweaty feet and macerated skin

    Persistently damp skin softens the fold and makes it easier for a nail spicule to burrow in.

  • Both sides of the same nail

    When both borders of a great toe nail are involved, total or double partial avulsion may be the more durable option.

  • Red flag - diabetic or ischaemic foot

    Any ingrown toenail in a diabetic, immunosuppressed or ischaemic foot needs early podiatry or vascular review, not home DIY.

Treatment

How ingrown toenails are treated in the UK.

Conservative care first, antibiotics only when infection warrants and definitive nail surgery - partial nail avulsion with phenolisation - for stage 2, stage 3 or recurrent disease.

  • Warm salt-water soaks

    Ten minutes twice daily in warm, lightly salted water softens the fold, reduces swelling and helps drain minor infection.

  • Cotton wisp technique

    A tiny wisp of cotton or dental floss tucked under the corner of the nail lifts the spicule off the fold while it grows out.

  • Straight-across nail cutting

    Trim the nail level with the end of the toe and never round the corners - this is the single most important preventive step.

  • Footwear and activity change

    Roomier toe boxes, moisture-wicking socks and a break from tight sports shoes take pressure off the inflamed fold.

  • Topical or oral antibiotics

    For frank infection with cellulitis - a short antibiotic course alongside drainage, not as a standalone fix.

  • Partial nail avulsion + phenol

    The preferred UK definitive procedure - a strip of nail is removed and the matrix ablated with 80% phenol. Success rates above 95%.

  • Zadik and Winograd procedures

    Surgical matricectomy techniques - useful when phenolisation is contraindicated or has failed, at the cost of a larger scar.

  • Specialist podiatry follow-up

    Ongoing nail care, orthotics for toe crowding and reviews for high-risk feet - the piece that keeps recurrence low.

Cross-reference

For a deeper look at the procedure itself, see our treatment guides to nail avulsion, phenolisation toenail surgery and foot orthotics.

What this guide is based on

The sources behind every claim on this page.

UK national guidance and specialist society standards, current at the time of last review.

Key references

Guidelines and standards we relied on.

A quiet reminder

This guide is for information, not medical advice.

Your GP or podiatrist knows your feet and history and can tell you which parts apply to you. If in doubt, get seen.

  • NICE CKS. Ingrowing toenail.

  • Royal College of Podiatry. Standards for nail surgery and phenolisation.

  • BMJ Best Practice. Ingrown toenail assessment and management.

  • Cochrane Review. Surgical treatments for ingrowing toenails.

Red flags

When ingrown toenails need urgent attention.

Most ingrown toenails are managed in primary care. These are the situations that are not - and where podiatry, vascular or emergency review is needed.

  • Diabetes and neuropathy

    Any ingrown toenail in a diabetic foot needs same-week podiatry review - a small infection can escalate quickly.

  • Peripheral arterial disease

    Reduced pulses or a cold, pale foot means slower healing and higher amputation risk. Vascular input is essential.

  • Spreading cellulitis or lymphangitis

    Red streaks up the foot or leg, fever or systemic upset need urgent GP or same-day emergency care.

  • Immunosuppression

    Chemotherapy, biologics, high-dose steroids or HIV increase infection risk. Do not manage these at home.

  • Osteomyelitis suspicion

    Deep, persistent pain, bone tenderness or a chronic sinus after a stage 3 ingrown nail warrants imaging and specialist review.

  • Paediatric recurrent ingrowth

    Repeated ingrown toenails in a child deserve podiatry input rather than repeated antibiotic courses from primary care.

  • Pigmented streak in the nail

    A dark longitudinal band is not an ingrown toenail - it needs dermatology review to exclude subungual melanoma.

  • Persistent granulation despite surgery

    Fleshy tissue that will not settle after a technically sound avulsion warrants a second opinion and biopsy.

  • Bleeding disorders or anticoagulation

    Nail surgery is still possible but the anticoagulation and haemostasis plan needs to be agreed with the prescribing team.

Living with it

A treatable problem, with a short ladder.

Four habits carry most of the load - the way you cut the nail, the shoes you wear, day-to-day foot hygiene and knowing when to stop cycling through antibiotics.

A quiet reminder

Straight cutting, roomy shoes, no bathroom surgery.

Digging out a spicule with clippers usually makes things worse. If it needs more than a soak, it needs a podiatrist.

  1. 01 Cutting

    Cut straight, not curved

    Trim the nail level with the tip of the toe. Rounded corners are the single biggest cause of recurrence.

  2. 02 Footwear

    Give the toes room

    Choose shoes with a wide toe box and moisture-wicking socks. Cramped trainers are a recurrence machine.

  3. 03 Hygiene

    Dry, clean, unhurried

    Wash and dry the feet daily, especially between the toes. A quick warm soak once a week keeps the fold soft.

  4. 04 Escalate

    Do not accept round three

    Two episodes is bad luck. A third is a signal for partial nail avulsion with phenolisation rather than another antibiotic course.

Frequently asked

Everything we get asked about ingrown toenails.

Quick answers on staging, conservative care, antibiotics and definitive nail surgery.

  • What is an ingrown toenail?

    Onychocryptosis - a nail edge that pierces or presses into the surrounding skin fold, causing pain, redness and sometimes infection. It is most common on the great toe and is graded 1 to 3 on the Heifetz classification.

  • How is it different from an ingrown toe-nails or ingrown toenail page?

    The clinical condition is identical - this plural page and our singular guide at /conditions/ingrown-toenail/ cover the same problem with consistent guidance. They exist to match how patients actually search.

  • Can I fix a stage 1 ingrown toenail at home?

    Usually yes. Warm salt-water soaks twice daily, a cotton wisp under the corner, straight-across cutting and roomier shoes settle most stage 1 problems within two weeks. If it is not improving after a fortnight, see a podiatrist or GP.

  • When do I need nail surgery?

    Heifetz stage 2 or 3 disease, repeated episodes in the same nail or any ingrown toenail in a high-risk foot deserves partial nail avulsion with phenolisation. Success rates are above 95% and recurrence is uncommon.

  • Are antibiotics enough?

    Rarely on their own. Antibiotics have a role in frank cellulitis but they treat the infection, not the mechanical cause. Without addressing the offending nail spicule the problem tends to come back.

  • What does phenolisation actually do?

    After a thin strip of nail is removed, 80% phenol is applied to the exposed nail matrix for around three minutes. This chemically ablates the matrix cells responsible for regrowth of that strip, so the nail comes back narrower and the offending edge does not return.

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