Few things derail a fitness habit like chafing — that raw, burning, sometimes bleeding skin from friction during a run or workout. It’s painful, it’s demoralizing, and it can keep you off your feet for days. The good news: it’s almost entirely preventable once you know the causes. Here’s how to stop chafing before it starts, and what to do if you’re already raw.

What causes chafing

Chafing is skin damage from repeated friction — skin rubbing on skin, or skin rubbing on clothing — usually made worse by moisture (sweat) and salt. The classic hotspots: inner thighs, underarms, nipples (especially for runners), under sports bras, the groin, and feet. Anywhere that rubs, repeatedly, while you’re sweaty, is a candidate. Longer sessions and hot, humid conditions crank up the risk.

How to prevent it

A few simple habits stop almost all chafing:

  • Use an anti-chafe balm or lubricant. This is the big one. A glide stick, balm, or even plain petroleum jelly on the friction-prone spots (inner thighs, nipples, underarms) before a workout dramatically cuts rubbing. Cheap, effective, the #1 fix.
  • Wear the right clothing. Snug, seamless, moisture-wicking fabrics rub far less than loose cotton (which gets soggy, heavy, and abrasive when wet). Fitted shorts or compression shorts under loose ones prevent thigh-on-thigh chafing. This is one place decent gear earns its keep.
  • Ditch cotton for sweaty sessions. Wet cotton is a chafing machine. Synthetic or technical fabrics stay drier and smoother.
  • Cover the hotspots. Runners: a small bandage or specific nipple covers prevents the dreaded “runner’s nipple.” Tape works in a pinch.
  • Stay as dry as you can. Anti-chafe products that also manage moisture, and changing out of soaked clothing, both help. Some people use powder in moisture-prone areas.
  • Make sure clothing fits. Too loose rubs; too tight with rough seams digs in. Aim for smooth and snug.

If you’re already chafed

Caught it too late? Treat raw skin like the minor wound it is:

  • Clean it gently and let it dry.
  • Apply a soothing barrier — a healing ointment or barrier cream — to protect it and ease the sting.
  • Give it a day or two if it’s raw. You can usually still train (especially non-aggravating activities), but don’t grind the same raw spot.
  • See a doctor if the skin breaks badly, looks infected (increasing redness, warmth, pus), or won’t heal. Broken skin can get infected.
Chafing scales with distance and heat. It often shows up when you increase your run length or train in summer — exactly when you're building momentum. Don't let a raw patch convince you running "isn't for you." Lube up the hotspots, fix the fabric, and the problem mostly disappears. A $5 balm has saved more running habits than any gadget.

Don’t let it stop you

Chafing is one of those small, fixable obstacles that quietly ends fitness habits because it makes the next workout sound miserable. Solve it once — balm, right clothing, cover the hotspots — and it stops being a reason to skip. The discomfort is preventable; quitting over it isn’t necessary.

Sort the friction, then get back to the work — which is the only part Gym Bully AI actually cares whether you do. Glide on the balm, lace up, and go chafe-free.