Blackheads
Acne is a common skin condition that affects most people at some point. It causes spots, oily skin and sometimes skin that's hot or painful to touch.
Teenage acne is thought to be triggered by increased levels of a hormone called testosterone, which occurs during puberty.
Your GP will be able diagnosis acne by looking at your skin. This will involve examining your face, chest and back for the different types of spot.
Treatment for acne depends on how severe it is. It can take several months of treatment before acne symptoms improve.
Acne scarring can sometimes develop as a complication of acne. This is more common when the most serious types of spots burst and damage nearby skin.