Acne is a beauty problem that plagues most teenagers. Due to the addition of hormones in food, the acne problem has become more and more serious, so how should acne be prevented? 1, adolescent men and women should usually pay more attention to protecting their skin, pay attention to their usual facial hygiene, wash their faces with a mild cleanser, do not use a high alkaline soap or cleansing milk. You should pay more attention to sleep and not stay up late. It is not easy to be too nervous, panic, irritability and insomnia can cause acne. 2, try to avoid spicy and stimulating food and sweet food. Usually you should eat more vegetables and fruits, soy products, etc. 3, eat more food containing more fiber to keep the intestines open and avoid constipation.