Hormonal changes in your body can provoke or
aggravate acne. Such changes are common in: Teenagers, both boys and girls,
Women
and girls, two to seven days before their periods, Pregnant women, People using
certain medications, including cortisone Other risk factors include: Exposing
your skin directly to greasy or oily substances, or to certain cosmetics. Having
a family history of acne. If your parents had acne, you may be likely to
develop it too. Friction or pressure on your skin caused by items such as telephones
or cell phones, helmets, tight collars and backpacks. Acne is rarely a serious
medical condition. But you may want to seek medical treatment from a
dermatologist for persistent pimples or inflamed cysts to avoid scarring or
other damage to your skin. If acne or the scars it may have left are affecting
your social relationships or self-esteem, you may also want to ask a
dermatologist if your acne can be controlled or if your scars can be diminished