What is folliculitis?

Folliculitis is inflammation of the hair follicles — the tiny pockets your hairs grow from. It shows up as small red bumps or pus-topped pimples, often in clusters, and can be itchy or tender. It's usually caused by bacteria getting into follicles that have been damaged by shaving, friction, sweat, or occlusion, though yeast and other causes are possible too. Most cases are mild and clear on their own.

How is folliculitis different from acne?

They look similar, but the trigger differs. Acne starts with follicles clogged by oil and dead skin cells; folliculitis starts with follicles that are irritated or infected — each bump usually centers on a hair. A big practical clue: folliculitis is often itchy and can appear anywhere hair grows (thighs, buttocks, beard, scalp), while acne favors oil-rich zones. Because the causes differ, standard acne products may not clear folliculitis.

How do you get rid of folliculitis?

Mild folliculitis often resolves on its own within a week or two once you remove the trigger — stop shaving the area for a while, switch to loose clothing, and shower promptly after sweating. A warm compress and a gentle antibacterial wash can help. If it's widespread, painful, spreading, or keeps coming back, see a doctor: depending on the cause, you may need a prescription antibiotic, antifungal, or other targeted treatment.

Can you get folliculitis from a hot tub?

Yes. 'Hot tub folliculitis' is caused by Pseudomonas bacteria that survive in inadequately treated warm water. Itchy red bumps appear a day or two later, typically on skin that was covered by a swimsuit. It usually clears on its own in healthy people, but see a doctor if it's severe, widespread, or not improving.

Folliculitis, Explained (Acne-Like Bumps That Aren't Acne)

You notice a crop of small red bumps — maybe on your thighs, beard, chest, or scalp. They look like acne, but they're itchy, and acne products aren't touching them. There's a good chance you're dealing with folliculitis: inflamed or infected hair follicles. It's common, usually mild, and very treatable once you know what's driving it.

What folliculitis actually is

Every hair on your body grows out of a follicle — a tiny pocket in the skin. When a follicle gets damaged and then inflamed or infected, that's folliculitis. It appears as small red bumps or pus-topped pimples, often in clusters, each one centered on a hair. It can be itchy, tender, or both (StatPearls).

Most folliculitis is set off when follicles are damaged, then invaded by germs that are normally harmless on the skin (AAD). Common ways follicles get damaged:

Shaving, waxing, or plucking (this overlaps with razor bumps)
Friction from tight clothing or gear rubbing the skin
Sweat and occlusion — hot, humid conditions and non-breathable fabrics
Soaking in a poorly maintained hot tub or pool

While bacteria (often Staphylococcus) are the usual culprits, folliculitis can also be caused by yeast, other fungi, viruses, or simple irritation — which is exactly why one-size-fits-all treatment doesn't always work.

Folliculitis vs. acne (and other look-alikes)

Because the bumps resemble acne, folliculitis is easy to misread. A few distinctions:

Acne begins with follicles clogged by oil and dead skin; folliculitis begins with follicles that are irritated or infected. Folliculitis is more likely to itch and to show up in places acne usually doesn't (buttocks, thighs, lower legs).
Fungal acne is actually a type of folliculitis caused by malassezia yeast — uniform, itchy bumps that flare after sweating or antibiotics.
Body acne on the back and chest is a frequent point of confusion; the two can even coexist.

If "acne" on your body is itchy, unusually uniform, or unresponsive to acne treatment, folliculitis is worth considering.

Hot tub folliculitis

One specific type is worth calling out. Hot tub folliculitis is caused by Pseudomonas aeruginosa, a bacterium that survives in warm water when disinfectant levels are too low. Itchy red bumps show up about one to two days after soaking, classically on the skin that was under your swimsuit (Cureus, 2020). In healthy people it usually clears on its own, but it's a good reminder to steer clear of cloudy or poorly maintained tubs.

What helps

Most mild folliculitis clears on its own within a week or two once you remove the cause. To help it along and prevent repeats:

Take a break from shaving the affected area, or switch technique (shave with the grain, use a clean sharp blade, don't stretch the skin). See our shaving and razor-bump guide.
Wear loose, breathable clothing, especially in heat and humidity — friction and trapped sweat are major triggers (AAD).
Shower promptly after workouts and change out of damp clothes.
Try a warm compress and a gentle antibacterial or benzoyl peroxide wash.
Avoid picking or squeezing, which spreads it and can scar.

If the cause is fungal rather than bacterial, an antifungal is what works — another reason a persistent case is worth getting properly identified.

When to see a doctor

See a healthcare provider or dermatologist if your folliculitis is:

Spreading, painful, or producing large pus-filled bumps or boils (this can signal a deeper infection).
Not improving after a week or two of good self-care, or keeps coming back.
Accompanied by fever or feeling unwell.
Happening while you're immunocompromised or have diabetes — infections deserve earlier, closer attention.
Affecting the beard or scalp and causing hair loss or scarring, which needs prompt treatment.

Depending on the cause, treatment may be a prescription antibiotic, an antifungal, or other targeted care — quick to sort out once someone identifies which type you have.

Not sure whether those bumps are folliculitis, acne, or something else? A dermatrix.life skin assessment reviews photos you upload and returns a private, plain-language summary of what it sees — a helpful starting point before you decide what to try or when to get help. It's informational only, not a diagnosis, and never a substitute for a professional.