Scalp folliculitis is inflammation of the hair follicles that shows up as itchy or tender pus-filled bumps; most cases are mild and clear up, but certain recurring forms can scar and cause permanent hair loss.
Folliculitis means inflamed hair follicles. On the scalp it appears as small red bumps or whiteheads, often around individual hairs, that can itch, sting, or feel tender. Most folliculitis is superficial and resolves, but persistent or deep cases need attention.
What causes it
Causes fall into a few groups:
- Bacterial — commonly Staphylococcus aureus, the most frequent infectious cause.
- Fungal or yeast — such as Malassezia (Pityrosporum) folliculitis, which can look like acne and often itches.
- Irritation and occlusion — sweat, heavy hair products, tight hats or helmets, and friction can clog and inflame follicles.
- Other triggers — shaving, picking, and sometimes medications such as corticosteroids or long courses of antibiotics.
When it scars
Most folliculitis heals without lasting damage. The concern is a small group of deeper, chronic conditions that can destroy follicles and cause scarring (cicatricial) hair loss. The best-known is folliculitis decalvans, a rare neutrophilic scalp disorder with recurrent painful pustules, crusting, and tufts of several hairs emerging from one opening; it is strongly associated with S. aureus and can leave permanent bald patches. Because scarring loss is irreversible, suspected cases need prompt dermatology care.
Treatment
Mild folliculitis often improves with gentle washing, antibacterial or antifungal shampoos, and removing the trigger. Bacterial cases may need topical or oral antibiotics; fungal cases need antifungals rather than antibiotics, since antibiotics can make Malassezia folliculitis worse. For folliculitis decalvans, dermatologists often use prolonged oral antibiotic regimens (for example, combinations such as rifampicin with clindamycin) for several months, sometimes alongside anti-inflammatory or other agents for resistant disease. Treatment should always be guided by a clinician.
When to see a doctor
See a clinician if bumps are painful, spreading, recurring, crusting, or accompanied by visible bald patches, or if home measures do not help within a couple of weeks. These features can point to a deeper infection or a scarring condition where early treatment matters most. A swab or culture helps identify the organism so the right antibiotic or antifungal is chosen. Seek prompt care if there is fever, rapidly spreading redness, or marked swelling.
In the meantime, avoid picking or squeezing bumps, ease up on heavy pomades and tight head coverings, wash sweat off promptly, and keep towels, combs, and hats clean. Do not start leftover antibiotics on your own — using the wrong agent can delay correct treatment and, with scarring forms, lost time can mean lost follicles.
Try the free self-check →FAQ
Will scalp folliculitis make my hair fall out permanently?
Usually not. Most folliculitis is superficial and hair recovers once the inflammation settles. Permanent loss happens mainly with deep, chronic, scarring types such as folliculitis decalvans, which is why recurrent, painful, or crusting bumps should be evaluated by a dermatologist promptly.
How can I tell folliculitis from regular acne or dandruff?
Folliculitis bumps center on hair follicles and often feel itchy or tender, sometimes with pus, while dandruff is mainly flaking without distinct bumps. Telling fungal, bacterial, and inflammatory causes apart by sight alone is hard, so a dermatologist may take a swab or culture to confirm the cause and pick the right treatment.
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⚠️ When to see a doctor — don’t self-treat
- Sudden patchy or circular bald spots
- Redness, scaling, pus, pain or itch (possible scarring alopecia — treat urgently)
- Broken hairs or rapid loss
- Loss with body-wide signs (weight loss, fatigue, cycle changes, acne, extra hair)
- Loss right after a new medication
- Any hair loss in a child