Scalp Folliculitis And Hair Loss: Why It Happens And Does It Grow Back
Last reviewed on 5 August 2026. We review our treatment guides every six months to keep them accurate.
Key points
Folliculitis means inflamed hair follicles. On the scalp it shows up as small red spots, often with a pustule (a whitehead) at the centre, and it can be itchy or tender.
Most scalp folliculitis is superficial and temporary. Any hair loss it causes is usually reversible, and the hair regrows once the inflammation settles, according to DermNet.
It is commonly caused by a bacterial infection (most often Staphylococcus aureus), sometimes by yeasts or fungi, and often by irritation from ingrown hairs, shaving or heavy scalp products blocking the follicles.
There is one uncommon but important exception: a chronic scarring form called folliculitis decalvans, which destroys follicles and does cause permanent hair loss. It needs specialist treatment and should not be left to run.
Treatment usually means good scalp hygiene, an antiseptic wash, and antibiotic or antifungal treatment aimed at the cause, guided by a doctor.
Folliculitis is also one of the most common things people notice in the weeks after a hair transplant. There it is usually a benign, self-limiting reaction that does not threaten the result, though a busy or recurring case should be shown to your clinic.
Because the treatment depends on the cause, and because the scarring form matters, persistent or worsening scalp folliculitis should be seen by a GP or dermatologist rather than only self-treated.
A crop of itchy red spots or pustules on the scalp is unsettling at the best of times, and more so if hair seems to be coming away with them. The reassuring news is that most scalp folliculitis is a superficial, treatable problem that does not cause lasting hair loss. The important caveat is that a small number of cases are a scarring condition that does, which is why knowing the difference, and when to get it checked, matters.
This guide explains what scalp folliculitis is, whether and why it causes hair loss, the rare scarring form to watch for, what causes it, how it is treated, and what it means when it appears after a hair transplant. Because the right treatment depends on the cause, anything persistent should be assessed by a doctor.
What is scalp folliculitis?
Folliculitis simply means inflammation of the hair follicles, the tiny pockets in the skin that each hair grows from. As DermNet puts it, folliculitis is "an inflamed hair follicle due to any cause", and "the result is a tender red spot, often with a surface pustule". On the scalp this typically looks like clusters of small red bumps or whitehead-like spots around the hair, sometimes itchy, sometimes sore, and sometimes crusting over as they heal.
Folliculitis can be superficial, affecting just the top of the follicle, or deep, reaching further down and occasionally forming a boil. The great majority of scalp cases are the superficial kind. It is not the same as ordinary dandruff or scalp psoriasis, which cause scale and flaking rather than pustules, though an itchy scalp can involve more than one problem at once; our guides on dandruff and scalp psoriasis cover those.
Does scalp folliculitis cause hair loss?
It can, but for the common forms the hair loss is temporary. Inflammation around the follicles, together with the scratching and picking that an itchy, spotty scalp invites, can tip some hairs into shedding, and hairs sitting within inflamed or pustular spots may come away. Because ordinary folliculitis does not destroy the follicle, the hair grows back once the inflammation is brought under control.
So for the superficial, infective or irritant folliculitis that most people get, the picture is much like other reversible scalp problems: treat the cause, calm the scalp, and the hair recovers. The exception, which is worth understanding clearly, is the scarring form below.
When is folliculitis serious? Folliculitis decalvans
A small number of people have a very different and more serious condition called folliculitis decalvans. Unlike ordinary folliculitis, this one scars. DermNet describes it as "a chronic, neutrophilic inflammation that results in scarring hair loss", and is blunt about the outlook: "early diagnosis and treatment are important but permanent hair loss is to be expected".
It tends to affect the crown, and has some recognisable features: crops of follicular pustules and crusting at the edge of a spreading patch, redness, and a characteristic sign called tufting, where several hairs emerge from a single widened follicle opening, sometimes described as a "doll's hair" appearance. It is thought to be an abnormal immune reaction to Staphylococcus aureus bacteria, and it is managed by dermatologists with prolonged courses of antibiotics and other treatments, not by scalp washes alone.
The practical message is not to panic, since this form is uncommon, but to take persistent, painful, pustular scalp folliculitis seriously, especially if you can see smooth, shiny, hairless patches developing. That is a sign the follicles may be scarring, and early specialist treatment gives the best chance of limiting the damage. Our guide on scarring hair loss explains why acting early matters whenever scarring is a possibility.
What causes scalp folliculitis?
Scalp folliculitis is most often caused by bacterial infection, sometimes by yeasts or fungi, and often by irritation from ingrown hairs, shaving or blocked follicles.
Folliculitis is a pattern of inflammation rather than a single disease, and several things cause it. According to DermNet, the common culprits are:
Bacterial infection, most often with Staphylococcus aureus. This is the usual cause of the crops of pustules people picture when they think of folliculitis.
Yeasts and fungi, including Malassezia (which causes a distinctive itchy, monomorphic pustular folliculitis) and the fungi responsible for ringworm.
Irritation from hair regrowth after shaving, waxing or plucking, where the hair re-entering the skin inflames the follicle. On the scalp this is more relevant to shaved heads and beard lines.
Occlusion, where heavy ointments, oils, greasy styling products, hats or sweat block the follicles and trap bacteria against the skin.
Some people are simply more prone to it, and factors such as heavy sweating, friction, diabetes and a weakened immune system can all make folliculitis more likely or more stubborn. Working out which cause is at play is what points to the right treatment, which is why a doctor may take a swab of a pustule if it keeps coming back.
How is scalp folliculitis treated?
Treatment aims at two things: settling the current flare and removing whatever is driving it. The single most important point is that the right treatment depends on the cause, because bacterial and fungal folliculitis are treated in completely different ways. This is why a doctor may take a swab of a pustule if the folliculitis is not clearing or keeps coming back.
If it is bacterial, the folliculitis is treated with antibiotics. The measures DermNet describes run from careful hygiene and an antiseptic cleanser or cream to an antibiotic ointment for localised spots and, for more widespread or stubborn infection, a course of oral antibiotics. An important point that catches people out is that a medicated anti-dandruff or antifungal shampoo will not clear a bacterial folliculitis. If the cause is bacterial, antibiotic treatment is the step that actually works, and reaching for a shampoo alone will simply let it drag on.
If it is fungal, the folliculitis is treated with antifungals rather than antibiotics, since antibiotics will not help and can sometimes make it worse. On the scalp this often means a medicated shampoo, most commonly a 2 per cent ketoconazole shampoo, used regularly on the affected area, with antifungal tablets kept for more resistant cases. Our guide on ketoconazole covers that shampoo in more detail.
Alongside whichever treatment is right, simple measures help: washing gently rather than scrubbing, avoiding heavy occlusive products and tight headwear during a flare, not picking or squeezing the spots, and keeping anything that touches the scalp clean. If folliculitis keeps returning despite treatment, a doctor will look for an underlying reason, such as a missed fungal cause, an area of skin carrying the bacteria, or a scarring process, rather than simply repeating the same approach.
Folliculitis after a hair transplant
Folliculitis deserves a section of its own here because it is one of the most common things people notice in the weeks after a hair transplant, and it worries them far more than it usually needs to. A 2026 review of hair-transplant complications describes folliculitis as "one of the most frequently reported postoperative complications following FUE", reporting an incidence of around 12 per cent, affecting the donor and recipient areas in roughly similar proportions.
It "typically occurs within the first 1 to 4 weeks after surgery, manifesting as erythematous papules or pustules surrounding follicular units", and it can be either a genuine infection or, more often, a sterile inflammatory reaction as the transplanted or regrowing hairs settle in. A later, related version appears around week 10 as the new hairs start to grow through, particularly in people with thick, coarse or tightly curled hair, where a growing hair catches under the skin much like an ingrown hair.
The reassuring part is the outlook. The same review notes that "most cases resolve without sequelae", meaning they clear up without lasting harm. Management is gentle and familiar: warm compresses and gentle cleansing to soften crusts and let any pustules drain. For milder cases, many surgeons find that a soothing antiseptic healing cream, such as Sudocrem, applied until the spots clear is all that is needed. More severe or persistent outbreaks are treated with antibiotics, usually a topical antibiotic such as mupirocin or clindamycin for localised spots and oral antibiotics for more extensive or painful cases. The one caution the review adds is that "extensive or recurrent folliculitis may delay hair regrowth and negatively affect graft survival", so while the odd pustule is normal and expected, a busy, spreading or persistent outbreak should be shown to your clinic promptly rather than left. Our guide on redness and healing after a transplant covers the wider recovery.
It is worth knowing that true post-operative infection, as opposed to this common benign folliculitis, is genuinely rare after a modern transplant, which is why a few spots are usually nothing to fear. If you are unsure which you are looking at, your clinic would always rather you asked.
When should I see a doctor?
Mild scalp folliculitis often settles with good hygiene and an antiseptic wash. It is worth seeing a GP or dermatologist if it does not clear within a week or two, if it keeps coming back, if it is painful, spreading or crusting heavily, or if you can see smooth, shiny, hairless patches, which can be a sign of the scarring form. Getting the cause identified matters, because bacterial, fungal and scarring folliculitis are treated very differently, and because early treatment is the best way to protect the hair. Anyone recovering from a hair transplant who is unsure about spots on the scalp should simply ask their clinic.
Where does this leave scalp folliculitis and hair loss?
For most people, scalp folliculitis is an uncomfortable but temporary and treatable problem. The hair loss that can come with it is usually reversible, because the common forms inflame the follicle without destroying it, and the hair returns once the cause is treated and the scalp calms down. The important exception is folliculitis decalvans, an uncommon scarring condition that does cause permanent loss and needs specialist care, which is why persistent, pustular, scarring folliculitis should never simply be tolerated. And after a hair transplant, a crop of folliculitis is common, usually harmless and rarely a threat to the result.
Because the right treatment depends entirely on the cause, anyone with a scalp that stays sore, spotty or itchy, or who is worried about their hair, should see a GP or dermatologist, who can identify what is driving it and treat it properly.
Frequently asked questions
Does scalp folliculitis cause permanent hair loss?
Usually not. Most scalp folliculitis is superficial, and the hair loss it causes is temporary because the follicle is inflamed rather than destroyed, so hair regrows once it is treated. The exception is folliculitis decalvans, an uncommon chronic scarring form in which permanent hair loss is expected, which is why persistent, pustular, scarring folliculitis should be seen by a dermatologist.
Will my hair grow back after folliculitis?
For the common forms, yes. Ordinary bacterial, fungal or irritant folliculitis does not damage the follicle permanently, so the hair grows back once the inflammation is brought under control, following the normal hair cycle over a few months. Hair does not return only where scarring has occurred, as in folliculitis decalvans, which is why early treatment of persistent cases matters.
How do you get rid of scalp folliculitis?
By treating the cause and calming the scalp, and the cause matters because bacterial and fungal folliculitis are treated differently. Bacterial folliculitis needs antibiotics, and a medicated shampoo alone will not clear it. Fungal folliculitis is treated with an antifungal, often a 2 per cent ketoconazole medicated shampoo used on the affected area. Both are best guided by a doctor, alongside good hygiene and avoiding heavy products, tight headwear and picking. If it keeps returning, a doctor may swab a pustule to identify the cause rather than repeating the same treatment.
Is folliculitis after a hair transplant normal?
Yes. Folliculitis is one of the most common things people notice in the first few weeks after a transplant, affecting around 12 per cent of cases in one review, and it is usually a benign, self-limiting reaction that clears without lasting harm. Milder cases often settle with gentle cleansing and a soothing antiseptic healing cream such as Sudocrem, with antibiotics kept for more severe cases. A few pustules are expected, but an extensive, spreading or persistent outbreak should be shown to your clinic, since heavy folliculitis can occasionally affect regrowth.
How do I know if my folliculitis is the scarring kind?
Warning signs include folliculitis that is persistent and painful rather than settling, crops of pustules and crusting on the crown, several hairs emerging from one follicle (tufting), and smooth, shiny, hairless patches where follicles appear to have been lost. These suggest folliculitis decalvans or another scarring process and should be assessed by a dermatologist promptly, because early treatment gives the best chance of limiting permanent loss.
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