Acne Acne is a condition of the skin, which causes spots, especially on the face, shoulders and upper back. Acne tends to begin at puberty, and although most sufferers are over it within a few years, it may carry on for life. The places where the spots usually occur are the face, shoulders, and upper back. The largest spots are more likely to leave lasting scars.
Some people are more at risk of developing an obvious or raised scar to any injury or cut.
This reaction is known as keloid formation , and in people that have that tendency, there is more scarring as a result of acne. Causes Acne begins with the changes of puberty, and is due to the change in the hormones. It seems that it is usually a case of the skin over-reacting to the hormone levels, rather than there being particularly high hormone levels in those people who get bad acne. Too many of the cells lining the ducts are produced. This leads to tiny plugs blocking the ducts.