Chafing (skin)
Skin irritation from friction, moisture, or fabric.
Chafing is a skin irritation caused by friction, moisture, or rough fabric. This rubbing can produce a stinging or burning sensation, a red rash, or boils. In serious cases, swelling, bleeding, or crusting may occur. Severe chafing is called a friction burn.
Causes
Repeated rubbing, especially when combined with moisture, leads to chafing. Clothing rubbing against the skin is a common cause, as are improperly or overly loose garments that generate extra friction. Wearing a skirt in hot or humid weather may cause chafing on the upper thighs, while leggings or pants can protect against such rubbing. Ill-fitting clothes, such as sleeves, bra straps, waistbands, or a watch strap, may also cause chafing. "Jogger's nipples" refers to chafed nipples from a shirt rubbing while running. Obesity is often thought to cause thigh chafing, but the problem is equally noticeable in athletes with developed quadriceps and people with tight bone structures. Long-distance athletes like cyclists or marathon runners frequently experience chafing due to extended periods of skin irritation, and many may quit a race if it becomes severe. Salt and residue left after sweat evaporates can intensify friction when exercise resumes. Other contributing factors include hot weather, sensitive skin, sand from the beach, and prior skin irritation. Nursing mothers may develop chafed nipples from breastfeeding, and prolonged exposure to urine or feces with insufficient airflow can cause chafing on the buttocks, such as from diapers. Repeatedly blowing the nose during a cold or wearing a face mask can also cause chafing.
Prevention and treatment
To stop chafing from getting worse, keeping the skin dry is key, though hot weather and avoiding exercise can make this tough. Washing off sweat and salt after a workout helps. Powders like baby powder or potato flour, along with antiperspirants, can keep problem areas dry. Another option is to lubricate the skin with petroleum jelly, deodorant, or similar products to cut down on friction and let body parts move smoothly. For many people, especially with the upper thighs, clothing matters most. Cotton and garments with big seams are not a good choice. Instead, sports underwear and fabrics like polyester, nylon, or spandex can lessen or stop the irritation. Thigh bands are a type of anti-chafing gear that reduces skin-on-skin rubbing in the inner thigh. Wet wipes can clean off salt residue from sweat before you start exercising again. Once the cause is gone, the skin usually heals in a few days. Severe cases, known as friction burn, might get infected and need a doctor, and they can leave scars after healing.
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