Chafing is uncomfortable and painful skin irritation cause by repetitive skin friction. Chafing may be caused by the salt residue from sweating. When sweat dries and exercise is resumed, the salt may intensify the friction and cause further irritation. Chafing usually occurs through skin to skin contact of multiple body parts such as nipples, armpits, and inner thighs. Chafing is also caused by improper or loose fitting clothing generating extra friction. In some cases, obesity is the leading cause of thigh chafing.

Chafing is also common among athletes with muscular quadriceps and people with tight bone structures. Athletes such as marathon runners, cyclists, tennis players, soccer players, and football players can experience chafing due to extensive skin irritation period. There was a notable moment on a globally televised professional tennis match, one of the players called an emergency medical time out due to chafing of the nipples. His nipples were bleeding, causing him excruciating pain and discomfort. OSYS® Naturals would have been a great remedy for his chafing!