Folliculitis is an inflammation or infection of hair follicles that shows up as small red or skin-colored bumps, often with a tiny white head, clustered around individual hairs. It is extremely common on the legs, underarms, bikini area, back, chest and thighs, and it is frequently mistaken for regular acne or an allergic reaction. The good news is that mild folliculitis usually clears up in a week or two with the right care, and most cases are preventable once you know the common triggers.
This article is for general information and is not medical advice. See a doctor if bumps spread rapidly, become very painful, or do not improve after two weeks of home care.
What causes folliculitis
Folliculitis happens when a hair follicle gets irritated or infected, usually by bacteria (most often Staphylococcus aureus), though it can also be caused by yeast or fungus, or simply by friction and blocked pores with no infection at all. The most common triggers are: shaving or waxing against the direction of hair growth, wearing tight or non-breathable clothing during exercise, sitting in a hot tub that is not properly chlorinated (sometimes called hot tub folliculitis), sweating heavily without showering soon after, and using heavy oils or occlusive lotions on hair-bearing skin.
Step 1: stop the irritation
The first move is removing whatever is triggering it. Pause shaving or waxing the affected area entirely until the bumps clear. If you must remove hair, switch to a clean, sharp razor, shave in the direction of hair growth, and use a lubricating gel rather than dry shaving. Swap tight leggings or workout gear for looser, breathable fabric while it heals, and shower promptly after sweating rather than sitting in damp clothes.
Step 2: clean and treat the area
- Wash with an antibacterial or benzoyl peroxide cleanser. A gentle 2.5 to 5 percent benzoyl peroxide wash, left on for a minute before rinsing, is the most reliable over-the-counter treatment for bacterial folliculitis.
- Apply a warm compress. A warm, damp washcloth held on the area for 10 minutes, two to three times a day, helps bumps drain and eases discomfort.
- Use a topical antiseptic. Diluted tea tree oil or an over-the-counter antiseptic like chlorhexidine wash can help on mild cases, applied once daily.
- Do not pick, pop or scrub the bumps. This spreads bacteria to nearby follicles and increases the chance of scarring.
When it is exfoliation, not medication, that helps
A lot of what looks like folliculitis on the thighs and buttocks is really keratosis pilaris-adjacent: dead skin cells trapping the hair follicle rather than an active infection. In those cases, gentle chemical exfoliation is more useful than antibacterial products. A body wash with 2 percent salicylic acid or a lactic acid lotion, used a few times a week, helps keep follicles clear. Our guide to exfoliating skin the right way covers how often to do this without over-stripping the skin barrier, and our keratosis pilaris guide is worth reading if your bumps are more rough and skin-colored than red and pus-filled, since the two conditions overlap and are often confused.
Folliculitis after shaving specifically
Razor-related folliculitis, sometimes lumped in with razor bumps, has its own set of fixes: always shave with a fresh, single- or double-blade razor rather than a multi-blade one that tugs at the skin, shave with the grain of hair growth rather than against it, and apply a soothing, alcohol-free aftershave rather than a scented lotion. If ingrown hairs are part of the picture alongside the bumps, our ingrown hair treatment guide covers the follicle-freeing technique in detail.
Fungal (yeast) folliculitis is different
Small, uniform, intensely itchy bumps on the back, chest and upper arms that do not respond to benzoyl peroxide are sometimes fungal (malassezia) folliculitis rather than bacterial. This type actually gets worse with oily products and antibacterial treatments and needs an antifungal shampoo like ketoconazole, used as a body wash and left on for five minutes before rinsing, two to three times a week. If bumps have not budged after two weeks of standard treatment, this is worth considering and worth a dermatology visit to confirm.
Body acne overlap
Folliculitis on the back, chest and shoulders is frequently confused with body acne, since both show up as small bumps in the same areas. The distinction matters for treatment: acne responds to salicylic acid and benzoyl peroxide over weeks, while bacterial folliculitis often needs a shorter, more targeted antibacterial approach. If you are unsure which you are dealing with, our body acne guide walks through the visual differences and a routine that works for both.
Preventing folliculitis long term
- Shower immediately after workouts, hikes or anything that leaves you sweaty for more than 20 minutes.
- Wash workout clothes, towels and bedsheets that touch the affected area frequently, on hot water when possible.
- Avoid sharing razors, towels or gym equipment without wiping it down.
- Choose loose, moisture-wicking fabric over tight synthetic clothing during exercise.
- Check hot tub or pool maintenance before repeated use if bumps keep recurring after visits.
When to see a doctor
Most folliculitis clears with the steps above within one to two weeks. See a doctor if bumps are spreading quickly, become large and painful (possible boils), come with fever, do not improve after two weeks of consistent home care, or keep recurring in the same spot. A doctor can prescribe a topical or oral antibiotic, or an antifungal, once the type is confirmed, and can rule out other causes.
Frequently Asked Questions
What does folliculitis look like compared to acne?
Folliculitis appears as small, uniform bumps clustered tightly around individual hairs, often with visible hair in the center of each bump. Acne tends to be more varied in size, without a hair visibly at the center, and shows up in areas with more oil glands like the face, chest and back. The two can look nearly identical and are sometimes both present at once.
Can folliculitis go away on its own?
Mild folliculitis often clears on its own within a week or two once the trigger, usually friction, sweat or shaving, is removed. Warm compresses and an antibacterial wash speed this along. Recurring or worsening cases usually need a targeted treatment rather than time alone.
Is folliculitis contagious?
Bacterial and fungal folliculitis can spread to other parts of your own skin through shaving, scratching or shared towels and razors, and some forms can spread to other people through direct skin contact or shared equipment. It is sensible to avoid sharing razors and towels while you have active bumps.
What is the fastest way to clear up folliculitis?
Stop the irritating activity (shaving, tight clothing, prolonged sweat), wash the area with a benzoyl peroxide or antibacterial cleanser, apply a warm compress a few times a day, and avoid picking at the bumps. Most mild cases visibly improve within three to five days of consistent care.