Friction Rash: Causes, Prevention, and What Works Best

When your skin rubs against skin or tight fabric for too long, you might get a friction rash, a red, irritated patch of skin caused by repeated rubbing or pressure. Also known as chafing, it’s not just a minor annoyance—it can turn into open sores if ignored, especially in hot, sweaty conditions. This isn’t just a runner’s problem. Anyone who walks a lot, wears ill-fitting clothes, or spends time in humid environments can get it—new moms, hikers, cyclists, even people with larger body folds.

What makes a friction rash worse? Moisture, heat, and lack of airflow. Sweat turns skin into a sticky surface that grinds against itself. Cotton clothes help, but synthetic fabrics like nylon can trap sweat and make it worse. Body parts like inner thighs, underarms, under breasts, and groin are common spots. Kids get it too, especially when diapers don’t fit right or they’re active in tight clothes. The good news? You don’t need fancy products to fix it. Simple steps like keeping skin dry, using barrier creams, and wearing smooth, loose fabrics stop most cases before they start.

Some people turn to talcum powder, but that’s not always safe—it can clump and trap moisture. Zinc oxide ointments, petroleum jelly, or even unscented deodorant sticks work better as shields. If the rash breaks open, clean it gently and let it breathe. Antibiotic creams are rarely needed unless there’s real infection. If it doesn’t improve in a few days, or if it’s painful and oozing, it might be something else—like a fungal infection or contact dermatitis. Don’t guess. Check with a doctor.

Below, you’ll find real-world advice from people who’ve dealt with this exact problem. Whether it’s how to prevent chafing during long walks, what products actually work for sensitive skin, or how to treat a rash that won’t quit—these posts give you the straight facts without the fluff. No marketing hype. Just what helps—and what doesn’t.