what causes chafing
3. Sweat. When you are exercising, sweat can irritate the area and cause chafing. The salt from the sweat can become trapped in areas such as the thigh which irritates the skin and increases the chance of chafing as the skin comes in contact with your clothing or skin.
1. Clothing. The most common cause of chafing in the thigh area is your clothing rubbing against the area. If you wear clothing that does not fit well it can rub against the thigh as you move, causing irritation from the friction.
Some associate chafing with being overweight. If you are holding excess weight in the thighs it can cause them to rub together, and the friction of the skin can cause chafing in the area.