Risk factors
Family history. Genetics plays a role in acne. If both parents had acne, you're likely to develop it, too.
Greasy or oily substances. You may develop acne where your skin comes into contact with oily lotions and creams or with grease in a work area, such as a kitchen with fry vats.
Friction or pressure on your skin. This can be caused by items such as telephones, cellphones, helmets, tight collars and backpacks.
Stress. This doesn't cause acne, but if you have acne already, stress may make it