Whiteheads, blackheads, and other types of acne occur when skin glands become plugged with oil and bacteria. They commonly appear on the face, chest, and upper neck and back. Contrary to what many people think, chocolate, greasy foods, and dirt are usually not to blame for acne. However, hormones, which can affect skin glands, are a major contributor. Other hormonal influences include pregnancy and menopause.
Some experts also blame chronic stress for the rising incidence of acne among women.
Stress increases levels of certain hormones. Whatever the culprit, women today have a lot of options for fighting back. Alpha-hydroxy acid solutions also may help. These treatments work by preventing new acne. So, it may be a month or two before you notice an improvement.