Hormonal changes are the main factors. Androgen hormone levels will high levels during teens and especially the male. Then Cause acne in this period more than any other period. This hormone stimulates the sebaceous glands are large. Cause the creation of more fat resulting in clogging of pores until Comedone occurs and Become inflammatory acne. Some women may have more acne in the before monthly period. Because level of progesterone hormone is making more affect the swelling of the pores.
Some believed that certain kinds of food such as chocolate or oily foods. That cause acne, but reality there is no any experiment these foods the cause of acne, But if you notice that type of food affect acne symptoms worse. May tries to avoid or stop eating that type. And then It noted that the symptoms of acne better?