Folliculitis from Grappling and Gym Mats

Those little red bumps that crop up after a hard week of training are often folliculitis — irritated or infected hair follicles. I've had them, most people I train with have had them, and they're usually minor — but occasionally they're more than that, so it's worth knowing the difference. Here's the plain-English version, as general information rather than medical advice, and nothing here is about a product we sell. It's fact-checked against trusted dermatology sources and the doctors we work with.

What folliculitis is

Folliculitis is inflammation of the hair follicles — the tiny pockets each hair grows from. It can be set off by simple irritation and friction, or by bacteria and other organisms taking hold in the follicle. Typically it looks like small red bumps or whiteheads clustered around hair follicles, sometimes itchy and sometimes mildly tender, and it often turns up on the thighs, buttocks, chest, back or anywhere kit traps heat and sweat. DermNet has a clear clinical overview if you want the detail (DermNet: Folliculitis).

Why grapplers get it

Tight kit, constant friction against the mat and your partners, trapped sweat and skin that's been covered up and warm for an hour are all triggers. It often shows up exactly where rashguards, spats and shorts sit and rub. The same friction-and-sweat picture drives acne mechanica, which can look very similar — one good reason a patch of bumps isn't always what you first assume.

How to recognise it

Folliculitis tends to be a cluster of small bumps, each one centred on a hair, rather than a single patch that spreads outward. Some bumps may have a tiny whitehead; the surrounding skin can look pink and feel slightly itchy or sore. It's that "centred on the follicles" pattern, plus the location under sweaty kit, that points towards it. Plenty of other things cause bumpy rashes, though, so this is about recognising "probably irritated follicles," not making a firm diagnosis you then act on.

What helps day to day

• Get out of damp kit and shower promptly after training — see the post-training shower routine.
• Wash your kit after every session, and let your skin breathe between sessions where you can.
• Avoid aggressive scrubbing or shaving over already-irritated areas, which tends to make things worse.
• Don't pick or squeeze the bumps; that can spread irritation and let infection in.
• Support your skin barrier generally — there's more in skin barrier basics for athletes.

When it's more than simple irritation

Plenty of folliculitis is mild and clears with a bit of patience and the basics above. The signs that it might be more than irritation — and worth getting checked — are when bumps become painful, fill with pus, spread, keep coming back, or simply won't settle. A deeper or more stubborn infection of the follicles sometimes needs proper treatment rather than waiting it out, so it's not one to keep "managing" indefinitely on your own.

A note on hot tubs and shared water

There's a specific type sometimes called "hot tub folliculitis," linked to warm water that hasn't been properly maintained — think poorly treated hot tubs or pools. If you get a bumpy, itchy rash a day or two after a soak, that's worth mentioning to a pharmacist or GP, and worth a thought about where you've been in the water. It's a useful reminder that the cause isn't always the mats.

Common questions

Is folliculitis contagious?

Most everyday folliculitis from friction and sweat isn't something you "catch" from a partner. But because some cases involve bacteria, and because it can look like things that do spread, it's sensible to keep broken or weeping skin covered and avoid sharing towels until you know what you're dealing with.

Should I stop shaving the area?

Shaving over irritated follicles can make folliculitis worse, so easing off — or changing how you shave — while it settles often helps. If you shave for grappling reasons, a pharmacist or GP can suggest gentler approaches that are less likely to inflame the follicles.

Why does it keep coming back in the same spot?

Recurrence usually points to the conditions: kit that's tight or damp in that area, repeated friction, or skin that never quite gets a chance to dry. Sorting out the kit and the post-training routine is often what stops the cycle, and persistent or recurrent folliculitis is also worth a proper look rather than endless self-management.

When to see a doctor

See a pharmacist or GP if the area is painful, spreading, recurrent, or not improving, or if you're unsure what it is in the first place. And as with most skin issues in a contact sport, if it's open or weeping it's also a reason to pause training until it's sorted, both for your sake and your partners'.

This article is general educational information and not medical advice, and it isn't about any Combat Sports Hygiene product. If you're worried about your skin, contact a GP, pharmacist or dermatologist.