Folliculitis — telling harmless bumps from infection, and when to see a doctor

What folliculitis actually is

Each hair on your body grows from a small pocket in the skin called a follicle. Folliculitis is inflammation of that pocket — caused by bacteria, fungi, viruses, or simply physical irritation. The result is a tender red bump, often with a small white or yellow head at its centre, sometimes itchy or burning.

The bacterium most often responsible for the infectious form is Staphylococcus aureus (staph), which lives harmlessly on most people's skin but can enter through a tiny nick or abrasion. Fungal folliculitis (sometimes called pityrosporum folliculitis) is less common but often misidentified as ordinary acne on the chest or back, and crucially does not respond to antibiotic treatments.

There are also non-infectious types: hot-tub folliculitis (Pseudomonas bacteria from poorly chlorinated water), gram-negative folliculitis seen in people on long-term acne antibiotics, and eosinophilic folliculitis linked to immune conditions. The practical takeaway is that bumps that look similar can have very different causes — which is one reason persistent or spreading cases deserve a diagnosis, not just guesswork.

Common causes

Hair removal and the skin practices around it are among the most common triggers:

• Shaving: blades create micro-abrasions that allow bacteria in, especially with blunt or shared razors. Our shaving guide covers technique that lowers this risk.
• Waxing and close hair removal: temporarily opens the follicle and removes the top layer of skin, which can let organisms in before the skin reseals.
• Occlusion: tight clothing, synthetic fabrics, or anything that traps sweat and heat against the skin creates a warm, moist environment bacteria and fungi enjoy. The bikini area and inner thighs are particularly prone — see the notes on bikini-area hair removal.
• Friction: rubbing from sportswear, heavy backpacks or repeated contact can irritate follicles without any external organism being needed.
• Products: heavy oils, certain moisturisers and some sunscreens can block the follicle opening; this is sometimes called "acneform folliculitis" and is more common in people who apply thick products before working out.

Folliculitis vs ingrown hairs vs razor bumps

These three conditions overlap and are often confused, but they're not quite the same thing.

Ingrown hairs occur when a hair curls back or grows sideways into the skin rather than exiting cleanly through the follicle opening. You'll often be able to see the hair looping just beneath the skin surface. They're common after close shaving or hair removal that cuts the hair at a sharp angle, and they're especially frequent in people with naturally curly or coarse hair. Our dedicated ingrown hairs guide explains why they form and how to manage them.

Razor bumps (pseudofolliculitis barbae) are a specific pattern of ingrown-hair inflammation, predominantly on the face and neck, almost exclusively in people with curly hair. The hair re-enters the skin and triggers an immune reaction. The bumps can persist long-term if shaving continues and are technically not an infection.

Folliculitis may or may not involve a trapped hair. Its hallmark is the red halo or pus-head centred on a follicle opening. When both an ingrown hair and a bacterial infection are present simultaneously, you have what's sometimes called infected ingrown hair — both problems at once.

Why does the distinction matter? Treating a fungal folliculitis with over-the-counter antibacterial products won't help, and treating razor bumps with topical antibiotics won't address the mechanical cause. If over-the-counter or self-care measures aren't working after two weeks, that's a useful signal to get a clinical assessment rather than keep trying new products.

Gentle self-care for mild cases

For a small cluster of bumps that has appeared recently, feels only mildly tender and is clearly linked to a recent shave or wax, conservative self-care is reasonable:

• Leave the area alone: avoid shaving, waxing or any further hair removal on the affected skin until it has settled. Continuing to remove hair through inflamed follicles makes things worse.
• Warm compresses: a clean, warm (not hot) flannel held against the area for 10–15 minutes a few times a day can encourage inflammation to resolve and may help pus-heads drain without squeezing.
• Gentle cleansing: wash with a mild, unfragranced soap or wash and pat dry. Avoid harsh scrubs on active bumps.
• Breathable clothing: loose, natural fabrics reduce heat and friction on affected areas.
• Aftercare products: if you want to apply something soothing, look for simple, unfragranced formulas. Our aftercare guide explains what ingredients are genuinely helpful and which can worsen irritation.

Mild folliculitis typically clears in one to two weeks with this approach. If bumps are multiplying, worsening or not fading after two weeks, home management is no longer the right call.

Red flags — when to see a doctor

Reducing your risk

Folliculitis often comes back if the underlying trigger isn't addressed. A few consistent habits make a meaningful difference:

• Sharp, clean blades: replace disposable razors frequently. Bacteria colonise old blades quickly. Never share razors.
• Correct shaving technique: shaving with the grain (direction of hair growth) rather than aggressively against it reduces the chance of hairs being cut to a sharp angle that re-enters the skin. Detailed technique is covered in the shaving guide.
• Pre- and post-removal care: clean, dry skin before removal; appropriate soothing products after. Guidance specifically for hair-removal aftercare is in our aftercare guide.
• Exfoliation between sessions: regular, gentle exfoliation keeps follicle openings clear. Do this when skin is healed, not on active bumps.
• Hot-tub hygiene: check that pools and hot tubs you use are properly maintained. Pseudomonas folliculitis from inadequately chlorinated water is entirely preventable.