Causes Oil glands in the skin become blocked for unknown reasons, but sex-hormone changes during adolescence play a role. When oil backs up, it becomes infected by bacteria normally present in glands. Acne is not caused by dirt, masturbation or foods.
Cleanliness can lessen it, but sexual activity has no effect on it.
Some cosmetics Prevention None known. Don't massage sorest places. Cleanse skin gently. Do not use abrasives. Rinse soap off for 1 to 2 minutes.