Chafing can also be caused by improper or overly loose fitting clothing generating extra friction.
[1] Obesity is commonly thought to be a cause of thigh chafing, and in some cases losing body fat may help the issue, but the problem is just as noticeable in athletes with well-developed quadriceps and people with tight bone structures.
Chafing is quite prevalent among long-distance athletes such as cyclists or marathon runners due to the extensive time periods during which the skin is in irritating conditions.
Staying dry may keep skin from the developing further chafing, although this can be difficult in hot weather and requires avoiding exercise.
The use of products such as baby powder, potato flour or antiperspirant may help with keeping problem areas dry.
Sports focused underwear and clothing made from polyester, nylon or spandex may reduce or entirely solve the issue in some cases.