Hormonal changes in your body can provoke or aggravate acne. Such changes are common in:

  • Teenagers
  • Women and girls, two to seven days before their periods
  • Pregnant women
  • People using certain medications, including those containing corticosteroids, androgens or lithium

Other risk factors include:

  • Direct skin contact with greasy or oily substances, or to certain cosmetics applied directly to the skin
  • A family history of acne — if your parents had acne, you're likely to develop it, too
  • Friction or pressure on your skin caused by various items, such as telephones or cellphones, helmets, tight collars and backpacks
  • Stress doesn't cause acne, but if you have acne already, stress may make it worse
Oct. 21, 2011

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