Another factor in the cause of acne is genetics. Researchers believe that the tendency to develop acne can be inherited from parents. In addition, some drugs (for example, anti-epilepsy medication, prednisone, androgens and lithium) are known to cause acne. Cosmetics that have a greasy consistency may change the cells of the follicles, causing them to stick together and resulting in a plugged pore.
Things that can make acne worse include:
- Friction caused by leaning on or rubbing the skin; harsh scrubbing
- Picking or squeezing blemishes
- Pressure from bike helmets, backpacks, or tight collars
- Changing hormone levels in adolescent girls and adult women two to seven days before the start of the menstrual period
- Stress
Other factors that were previously thought to make acne worse do not seem to have an effect on the development of acne. These factors include chocolate, greasy foods, and dirty skin.
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