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Ingrowing Hair and Razor Bumps: Why They Keep Coming Back

Name: Faciem Dermatology & Medical Clinic
Price range: $$$

An ingrowing hair — also called an ingrown hair or a razor bump — is a hair that curls back or grows sideways into the skin instead of emerging from the follicle. The trapped hair inflames, leaving a tender bump and often a dark mark once it settles. Coarse, tightly curled hair is most affected, which is why the beard area, neck, bikini line and underarms suffer most.

This page sets out how ingrowing hair, razor bumps and pseudofolliculitis barbae are assessed and managed at Faciem, and is reviewed for clinical accuracy.
Last reviewed: 14 September 2026.
Patient information only. Suitability for any treatment, laser included, depends on your hair colour and skin tone, is assessed face to face with Dr Prasad, and is settled by a patch test before treatment begins.

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TL;DR

Ingrowing hairs occur when a hair re-enters the skin instead of growing out of the follicle, triggering inflammation and a tender bump. Coarse, curly hair is most affected, and in the beard area the condition is called pseudofolliculitis barbae. It is more common in Afro-Caribbean and Indian skin, where it also leaves darker marks and, in some cases, raised scarring. Because the hair itself is the trigger, reducing how thick and how dense the hair is stops new bumps forming, while exfoliation and prescribed skincare keep the follicle clear and treat the marks left behind.

About the Condition

What Is an Ingrowing Hair?

An ingrowing hair is a hair that grows back into the skin instead of out through the follicle opening, either by curling into the follicle wall or by re-entering the surface after being cut below it. The body treats the trapped hair as a foreign body, producing localised inflammation, a raised bump and often a lasting mark.

What do ingrowing hairs and razor bumps look like?

An ingrowing hair usually appears as a small raised bump, tender to touch, sometimes with the hair visible as a dark loop just beneath the surface. In fair skin the bump looks red; in deeper skin tones it is more often dark brown, purple or grey. Some fill with pus and resemble a spot, which is why ingrowing hairs are so often mistaken for acne. They cluster where hair is coarsest and most frequently removed: the beard area and neck in men, the bikini line, underarms and legs in women. Long-standing cases leave a mottled pattern of dark marks, and occasionally firm raised scars where the same spot has inflamed again and again.

Who gets ingrowing hairs?

Hair shape is the strongest single factor in ingrowing hair. Tightly curled hair grows from a curved follicle, so it is far more likely to re-enter the skin once it has been cut — which is why the problem is more common in Afro-Caribbean and Indian skin, and frequent wherever hair is naturally coarse, including Middle Eastern and Mediterranean skin. In the beard area the condition has its own medical name, pseudofolliculitis barbae, and it is a common reason men who shave daily give up shaving altogether. Anyone who shaves, waxes or plucks coarse hair can develop it. How often hair is removed, the method used and friction from collars, straps and sportswear all influence how badly.

What else looks like an ingrowing hair?

Several conditions mimic ingrowing hairs, and each is treated differently. Acne produces blackheads and whiteheads alongside inflamed spots and is not confined to hair-bearing areas. Folliculitis is inflammation or infection of the follicle by bacteria or yeast, usually itchier and more uniform across an area. Keloid scarring can grow out of repeated ingrowing hairs at the nape of the neck, and has to be managed as scar tissue before anything is done about the hair. Hidradenitis suppurativa causes deep, painful, recurring lumps in the underarms and groin, and needs quite different management again.

Causes & Contributing Factors

What Causes Ingrowing Hair?

Ingrowing hairs are caused by hair re-entering the skin instead of emerging cleanly from the follicle. Hair shape decides who is prone to it; hair removal supplies the opportunity. A hair cut at an angle below the skin surface has a sharp tip and a curved path, and readily pierces the follicle wall on its way back out.

Curved follicles and curly hair

Tightly curled hair grows from a curved follicle and naturally turns back towards the skin. This is why some hair types produce ingrowing hairs whatever the shaving technique, and why the beard area and neck are the worst-affected sites.

Shaving too closely

Cutting the hair below the skin surface leaves a sharp tip inside the follicle. As it grows, that tip can pierce the follicle wall instead of emerging — the reason a closer shave often produces more bumps, not fewer.

Waxing, plucking and epilation

Removing hair from the root can damage or distort the follicle, so regrowth emerges at an abnormal angle. Repeated over years, this makes ingrowing hairs progressively more likely in the same patch of skin.

Retained skin cells blocking the follicle

Dead skin cells build up over the follicle opening and trap the emerging hair beneath the surface. That is why regular gentle exfoliation reduces ingrowing hairs, though it does nothing about hair shape.

Friction and occlusion

Tight collars, sportswear, straps and underwear rub the area and press regrowing hairs back towards the skin. Friction also feeds the darkening that lingers long after the bump itself has settled.

Treatments We Offer

How Ingrowing Hairs and Razor Bumps Are Treated at Faciem

Treatment for ingrowing hair and pseudofolliculitis barbae is available at Faciem Dermatology & Medical Clinic on Kensington Church St, London, led by Dr Prasad. The approach targets the hair, not each individual bump: reducing the number and coarseness of hairs in the area is what stops new ones forming, while prescribed skincare clears the follicle opening and treats the marks left behind. Areas that are already inflamed or scarred are dealt with first.

Laser Hair Removal

Laser targets the pigment inside the hair, so regrowth returns finer and sparser and there is less hair left to grow inwards. Generally 4 to 6 sessions are needed, 4 to 6 weeks apart depending on the area, starting after a patch test, with settings chosen for your skin tone.

Best for: razor bumps that keep returning to the same area

Read about Laser Hair Removal

Medical-Grade Skincare

A written regime — typically an exfoliating cleanser, a granular exfoliator or a glycolic acid — keeps follicle openings clear, and prescribed products treat the inflammation and darkening around affected follicles.

Best for: blocked follicles and post-inflammatory marks

Read about Medical-Grade Skincare

Dermatology Consultation

Persistently inflamed areas, and any that have begun to thicken or scar, need assessing before hair reduction starts. A consultation separates what is active inflammation, what is pigment and what is scar tissue.

Best for: inflamed, scarred or long-standing razor bumps

Read about Dermatology Consultation

Where an area stays inflamed or has started to thicken, an injected anti-inflammatory such as triamcinolone may be considered after assessment, because repeated inflammation in one spot is what leads to keloids and scar tissue. What is used, in what order and over what timescale is decided face to face with Dr Prasad, and how much improvement follows differs from one person to the next.

When to Seek Medical Advice

When Should You See a Doctor About Ingrowing Hairs?

See a doctor about ingrowing hairs if they keep recurring, if they are leaving dark marks or raised scars, or if an area has become painful, spreading or infected. Repeated inflammation in the same spot is what produces scarring, so a case that has gone on for months deserves assessment instead of indefinite management at home.

Worth getting checked

Conditions that can look similar

Self-Care & Prevention

How to Shave Without Getting Razor Bumps

Most improvement at home comes from changing how the hair is removed, not from what goes on the skin afterwards. Shaving with the grain, using a single-blade razor and leaving the skin unstretched all keep the cut tip above the surface, which is where it needs to stay.

Do

Avoid

This is general guidance and does not replace individual assessment. What suits you depends on your hair type, your skin tone, and whether any area has already scarred.

Why Patients Choose Faciem

Treating the Hair, Not Each Individual Bump

Ingrowing hairs are usually treated as spots — something to clear whenever one appears. Since the hair is what causes them, working on hair thickness and density is what stops the cycle, and separating inflammation from pigment and from scar is what makes the plan work.

Experience & Expertise

Why Assessment Comes Before Laser

Ingrowing hair sits at an awkward intersection: the condition is most common in exactly the skin tones where laser hair removal demands the most care. Skin tone is graded on the Fitzpatrick scale, I to VI, before any laser setting is chosen. Deeper skin tones, Fitzpatrick IV to VI, can be treated with the right device and cautious settings — a longer wavelength, a lower fluence and more time between sessions — because deeper skin holds more melanin in the epidermis, which competes with the hair for the laser’s energy. The risk being managed is post-inflammatory pigmentation and injury to the surrounding skin rather than anything to do with the hair itself, which is why a patch test matters more here than anywhere and confirms how your skin responds before the first full session. There is a diagnostic question too — what looks like an ingrowing hair may be folliculitis, or an area may already have progressed to keloid scarring, which has to be treated before hair reduction begins. Dr Prasad establishes what is present, separates active inflammation from pigment and from scar, and plans treatment around your hair and skin type.

Dr Anamica Prasad — MBChB (1999), Dip Dermatology (2001), MRCGP, DFFP, DRCOG · a GMC-registered doctor
Member of the Joint Council for Cosmetic Practitioners (JCCP), British Medical Laser Association (BMLA), Royal Society of Medicine and the Aesthetic Complications Group
Clinic operated by Derma Medical UK Ltd, registered with the Care Quality Commission for diagnostic and screening procedures, surgical procedures, and treatment of disease, disorder or injury · CQC Location ID 1-25573003746
Face-to-face medical consultation and skin assessment before any laser treatment
20 years’ experience in dermatology, treating follicular conditions across every skin tone

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Ingrowing Hair FAQs

Your Questions, Answered

Razor bumps raise the same questions at almost every consultation: shaving technique, whether laser will help, how long the dark marks take to fade, and how any of it fits around the gym and the working week. If yours is not covered here, bring it with you.

Can I exercise or go to the gym with razor bumps?

Exercise is fine with razor bumps, but sweat and friction make them worse, so shower within an hour of training and change out of damp collars, straps and sports kit rather than sitting in them. Avoid shaving the area for 24 hours either side of a heavy session. After a laser hair removal appointment, leave the gym, swimming, hot yoga and saunas for 24 to 48 hours, until the redness around the follicles has gone.

What is pseudofolliculitis barbae?

Pseudofolliculitis barbae is the medical name for ingrowing hairs and razor bumps in the beard area and on the neck. Cut hair curls back into the skin, inflames, and produces bumps that can look like acne. It is more common in Afro-Caribbean and Indian skin, where hair is coarser and more tightly curled, and it can leave dark marks or raised scars when the same spots inflame repeatedly.

How soon can I go back to work or to an event?

You can go straight back to work after a laser hair removal session for razor bumps; expect redness and slight puffiness around the follicles for 24 to 48 hours, which most people cover with nothing at all. For a wedding, a shoot or anything photographed, book the session at least 5 days ahead, and shave the day before rather than the morning of it, so a bump that flares has 24 hours to settle.

Are the dark marks left by razor bumps permanent?

The flat brown, grey or purple marks are post-inflammatory hyperpigmentation, not scars, and they usually fade over months — more slowly in deeper skin tones, and faster alongside prescribed skincare. Raised, firm areas are scar tissue and behave differently, so they are treated as scarring. Stopping new inflammation is what allows the existing marks to fade without fresh ones replacing them.

How many laser sessions does it take to reduce razor bumps?

Generally 4 to 6 sessions are needed, 4 to 6 weeks apart depending on the area treated, with your own figure set after the patch test. Hair usually looks finer and sparser from the second or third session, which is often when the bumps start to settle, and top-ups are needed only infrequently, after a few years. Our laser hair removal page carries the rest of the detail.

Should I stop shaving if I have razor bumps?

Leaving the area unshaved for a few weeks lets trapped hairs grow out and inflamed skin settle, which is why growing the beard often clears razor bumps on its own. If shaving has to continue, go with the grain using a single sharp blade and leave the skin unstretched. During a course of laser, keep shaving between sessions instead of waxing or plucking, since laser needs the root left in place.

What affects the cost of treating ingrowing hairs?

Cost depends on how many areas are treated, whether laser, prescribed skincare or both are needed, and how many sessions your hair and skin call for. Laser is priced by treatment area and is normally booked as a course, which works out cheaper per session than single appointments; the area-by-area list appears on our laser hair removal prices page. Everything is confirmed in writing before treatment.

Sources & Further Reading

Ingrown hairs — causes and prevention — NHS
Pseudofolliculitis barbae — DermNet NZ
Post-inflammatory hyperpigmentation — DermNet NZ

These are general patient-information sources on ingrowing hair and the marks it leaves; none of them replaces an individual assessment. Your own diagnosis, and the plan that follows from it, come out of your consultation.

Ingrowing Hair in Kensington, London

A Doctor-Led Clinic in the Heart of Kensington

Hair reduction runs as a course of appointments spread over months, so getting to the clinic easily matters more here than it would for a single visit. Faciem Dermatology & Medical Clinic sits on Kensington Church St, a few minutes’ walk from High Street Kensington station and around ten from Notting Hill Gate, with the Kensington council underground car park close by. Saturday appointments suit men who shave for work and would rather not book time off, and the clinic is open Monday to Saturday, 10am to 7pm.

Plan Your Visit

Faciem Dermatology & Medical Clinic
Phone: +44 20 7131 3539
7 Kensington Church St, London W8 4LF, United Kingdom
Tube: High Street Kensington (few minutes’ walk) · Notting Hill Gate (~10 minutes)
Parking: Kensington council underground car park nearby
Open Monday–Saturday, 10am–7pm · Sunday closed
Book a consultation online; a patch test comes before any laser session
Consultation-first — no treatment without medical assessment
Serving Kensington, Chelsea, Notting Hill & Central London

Continue Exploring

Related Conditions & Treatments

Keloid & Raised Scarring

What happens when the same follicle inflames repeatedly and the healing response overshoots into raised scar tissue.

Hyper-pigmentation

The brown and grey marks left once razor bumps settle: why they linger in deeper skin, and how they are treated.

Acne

Spots, blackheads and inflamed papules — the condition razor bumps are most often mistaken for, and how to tell them apart.

Faciem Dermatology & Medical Clinic · Kensington

Get Recurring Razor Bumps Assessed Properly

Book a consultation with Dr Prasad to find out what is driving your ingrowing hairs, whether any area has already scarred, and which treatment suits your hair and skin type.

Prefer to talk? +44 20 7131 3539

Monday – Saturday	10am – 7pm
Sunday	Closed