BJJ skin infections: prevention and when to stay off the mat
Grappling is skin-to-skin contact on shared mats, which makes hygiene a genuine safety issue. Here's what to watch for and the one rule that protects everyone.
The common ones
The infections that circulate in grappling gyms include ringworm (a fungal infection, not a worm — circular, itchy patches), staph and impetigo (bacterial, often red sores or boils), and herpes gladiatorum (a viral infection causing clustered blisters). They spread by mat and skin contact, which is exactly what BJJ involves.
Prevention
- Shower promptly after every session — sooner is better
- Wash your gi and rashguard after every use; never re-wear sweaty gear
- Wear flip-flops off the mat; keep nails short and clean
- Cover any open cut before training and clean it after
- Support gyms that clean their mats regularly
This is general information, not medical advice
Injuries and skin conditions are individual. Nothing here can clear you to train. When in doubt, see a qualified clinician and wait until you're cleared.
The rule: when in doubt, stay off the mat
If you have a suspected or confirmed contagious skin infection, do not train until a clinician clears you. Training through it risks spreading it to everyone you roll with — and can turn a minor issue into a serious one for you. This is the single most important etiquette and safety rule in the sport.
Coming back
Once treated and cleared, ease back in. For how to do that after any layoff or injury, see our return-to-BJJ guide and the return-to-roll calculator.
Plan a safe return
Get general return timeframes to discuss with your clinician.
Open the return-to-roll calculator