Skip to main content

Health condition · Clinically reviewed

Ingrown toenail, from footwear and cutting technique to nail-edge avulsion with matrix phenolisation.

The classic ingrown big-toe nail — inflammation, infection and pain from the nail plate cutting into the surrounding skin. Modern stratified care: conservative measures first; wedge nail avulsion with matrix phenolisation for recurrent cases.

Jump to treatment See red-flag toe pain
A radiographer guides a patient onto the bed of an advanced 3 Tesla MRI scanner in a London imaging suite

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

    Every claim is checked against NICE, BOFAS or peer-reviewed sources you can see at the end.

  • 03

    Current for 2026

    Reflects current UK guidance on conservative care, wedge nail avulsion and matrix phenolisation.

Key facts

Ingrown toenail at a glance.

The essentials, in plain English — what onychocryptosis is, why it recurs, and what the evidence says actually fixes it.

  • Definition

    Onychocryptosis — the nail plate cutting into the surrounding paronychium, causing inflammation, infection and pain.

  • Big toe

    The great toe (hallux) is by far the most commonly affected — usually the lateral or medial nail fold.

  • Heifetz classification

    Stages 1–3 grade severity, from mild inflammation to chronic granulation and hypertrophic nail-fold tissue.

  • Common triggers

    Tight or narrow footwear, curved cutting of nail corners, trauma and a genetically curved nail plate.

  • Definitive fix

    Wedge nail avulsion with matrix phenolisation is highly effective for recurrent or advanced disease.

  • Low recurrence

    Recurrence after partial nail avulsion with phenol is under 5% in the published series.

Why this guide matters

Conservative first, phenol for the rest.

Most first episodes settle with soaks, footwear and cutting technique. For recurrent or advanced disease, wedge nail avulsion with phenol is a small, definitive procedure.

  • Cutting technique is preventive

    Straight-cut nails, wider footwear and clean nail-fold hygiene prevent most recurrences — no procedure required.

  • Phenol matters, not just avulsion

    Avulsion alone regrows in most people; adding chemical matricectomy with phenol drops recurrence to under 5%.

  • Diabetic feet deserve caution

    In diabetes, immunosuppression or vascular disease, an ingrown nail with cellulitis is urgent — same-day review.

How the diagnosis is made

From a sore nail-edge 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

    Recognising

    Symptom + footwear history

    The story is usually clear — nail-edge pain worsening over weeks, often after a change of shoes, a pedicure or a minor trauma.

  2. 02

    Recognising

    Nail-plate examination

    Inspect the nail fold, the shape of the nail plate and the depth to which the edge is digging into the paronychium.

  3. 03

    Recognising

    Rule out fungal nail differential

    Onychomycosis and subungual haematoma can mimic ingrown nail — a clean look at the plate and bed distinguishes them.

  4. 04

    Confirming

    Assess for cellulitis

    Spreading redness, warmth, lymphangitis or systemic upset changes the plan — antibiotics before or alongside any procedure.

  5. 05

    Confirming

    Diabetic foot risk screen

    Diabetes, vascular disease or immunosuppression raise the stakes considerably — lower the threshold for urgent podiatry review.

  6. 06

    Managing

    Heifetz stage

    Stage the severity — mild inflammation, established infection with drainage, or chronic hypertrophic granulation tissue.

  7. 07

    Managing

    Podiatry consultation

    For recurrent or stage 2–3 disease — for definitive wedge nail avulsion with matrix phenolisation under local anaesthetic.

Typical timeline: 1–3 weeks from first appointment to a settled plan.

Symptoms

What an ingrown toenail actually looks and feels like.

The pattern is telling — nail-edge pain, red inflamed border and, in advanced cases, granulation tissue and discharge.

  • Nail-edge pain

    A sharp, localised pain at the corner of the nail — worse in closed shoes and on walking.

  • Red inflamed border

    The paronychium becomes visibly red and tender — the classic early sign of an ingrown nail.

  • Local swelling

    Soft-tissue swelling at the nail fold, sometimes tense enough that the nail edge is no longer visible.

  • Pus discharge

    Yellow or green discharge from the nail fold indicates a superimposed bacterial paronychia.

  • Granulation tissue

    A fleshy, friable red mound of hypertrophic tissue at the nail fold — a Heifetz stage 3 feature.

  • Superimposed infection

    Warmth, throbbing and spreading redness suggest cellulitis — needs antibiotics alongside the procedure.

  • Recurrent episodes

    Repeated flares in the same nail fold are the classic indication for definitive matrix phenolisation.

  • Red flag

    Diabetic foot with cellulitis — urgent same-day review; delayed care risks osteomyelitis and amputation.

Treatment

How ingrown toenails are treated in the UK.

A staged approach — soaks, cutting technique and footwear first, then wedge nail avulsion with matrix phenolisation for recurrent or advanced disease.

  • Warm salt-water soaks

    Simple, cheap first-line care for mild disease — warm salty soaks twice daily reduce inflammation and soften the paronychium.

  • Cotton-wick technique

    A wisp of cotton or dental floss lifted under the nail edge — separates the plate from the fold while it grows out.

  • Wider footwear

    Broader, lower-pressure shoes take load off the nail fold — often the single biggest lever for early cases.

  • Antibiotics for cellulitis

    Oral antibiotics where infection is spreading beyond the nail fold — flucloxacillin per UK antimicrobial guidance.

  • Straight-cut nail technique

    Cut nails straight across, not curved into the corners — the single most important preventive measure long term.

  • Wedge nail avulsion (partial or total)

    Under local anaesthetic — a wedge of nail is removed to relieve pressure on the paronychium; partial is preferred over total.

  • Matrix phenolisation

    Chemical destruction of the nail matrix with phenol at the same sitting — reduces recurrence to under 5%.

  • Winograd / Zadik procedure

    Formal surgical matricectomy — reserved for cases where phenolisation has failed or is contraindicated.

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, podiatrist or foot and ankle team knows your history and can tell you which parts apply to you. If in doubt, get seen.

  • British Orthopaedic Foot and Ankle Society (BOFAS). Patient information and clinical standards.

  • NICE CKS. Onychocryptosis (ingrowing toenail) — diagnosis and management.

  • Royal College of Podiatry. Guidance on nail surgery and onychocryptosis.

  • Cochrane review. Surgical treatments for ingrowing toenails.

Red flags

When an ingrown nail is not just an ingrown nail.

Most cases are mechanical and settle with definitive treatment. These are the situations where a different or urgent diagnosis needs to be considered.

  • Diabetic foot cellulitis

    Ingrown nail with spreading redness in a person with diabetes — same-day review; risk of osteomyelitis and limb loss.

  • Immunosuppressed patient

    Infection in a patient on chemotherapy, biologics or long-term steroids — lower threshold for admission and IV antibiotics.

  • Osteomyelitis of distal phalanx

    Persistent pain, discharge and bony tenderness after treatment — imaging and orthopaedic review to exclude bone infection.

  • Recurrent post-phenolisation

    Regrowth after matrix phenolisation is uncommon — needs review with a foot and ankle surgeon for formal matricectomy.

  • Chronic paronychia

    Persistent low-grade nail-fold inflammation not responding to standard care — consider fungal or dermatological cause.

  • Melanoma of nail bed differential

    Pigmented streaks or unexplained bleeding under the nail — always consider subungual melanoma; do not assume ingrown nail.

  • Post-op regrowth

    Regrowth of the offending nail edge weeks to months after surgery — needs review, not repeated home remedies.

  • Chronic granulation

    Persistent hypertrophic granulation tissue after treatment — may need silver nitrate or excision to resolve.

  • Painful post-op stump

    Persistent pain at the nail-fold site after surgery — review for infection, inclusion cyst or neuroma.

Living with it

A common problem, with a very reliable fix.

Four things that make the biggest difference day to day — cutting technique, footwear, hygiene and knowing when to see a podiatrist.

A quiet reminder

Straight-cut nails, wider shoes.

Two small habits, kept up for years, prevent almost every recurrence — worth building in early.

  1. 01 Cutting

    Cut straight, not curved

    Nails cut straight across — never rounded into the corners — is the single most important preventive habit.

  2. 02 Footwear

    Give your toes room

    Wider toe boxes and lower-pressure shoes stop the nail fold being crushed against the nail plate.

  3. 03 Hygiene

    Salt-water soaks

    A short daily salt-water soak keeps the paronychium clean and reduces flare-ups in susceptible nails.

  4. 04 Reviews

    See podiatry early

    If it flares more than once, see a podiatrist — definitive wedge avulsion with phenol is a small procedure with a big return.

Frequently asked

Everything we get asked about ingrown toenails.

Quick answers on soaks, antibiotics, wedge avulsion, phenol and when to seek help.

  • What actually causes an ingrown toenail?

    The nail plate cuts into the surrounding paronychium — usually the great toe. Tight footwear, curved cutting of the nail corners, minor trauma and a genetically curved nail plate are the main drivers.

  • Can I treat it at home?

    Mild cases (Heifetz stage 1) often settle with warm salt-water soaks twice daily, a small cotton wick lifted under the nail edge, wider footwear and straight-cut nail technique. Recurrent or infected cases need podiatry review.

  • Do I need antibiotics?

    Only if the infection is spreading beyond the immediate nail fold — with redness, warmth, lymphangitis or systemic upset. Simple paronychia around an ingrown nail does not always need antibiotics; the definitive fix is removing the offending nail edge.

  • What is wedge nail avulsion with phenol?

    Under local anaesthetic, a wedge of the nail plate is removed and phenol is applied to the underlying nail matrix to chemically destroy the strip that regrows. It is a small day-case procedure with a recurrence rate under 5%.

  • How long does recovery take?

    Most people are walking comfortably within a few days. The nail fold weeps for two to four weeks while it heals, with daily salt-water soaks and dressing changes. Return to sport is usually at three to four weeks.

  • What is the red flag I should not ignore?

    A diabetic foot with cellulitis around an ingrown nail — same-day review. Also pigmented streaks or unexplained bleeding under the nail, which can be subungual melanoma rather than a simple ingrown nail.

Related content

Keep reading.

WhatsApp Call us

Nearby in the library

More conditions to explore

Browse all →
Pulse Healthcare concierge

Send us your enquiry

A concierge service for UK private healthcare. We match you with the best vetted clinics and consultants in our network - they then contact you directly.

So we can match you to the right clinician close to you.

Confidential. We respond within one working day.