Acne is a common skin disease in adolescence. Mild acne can be treated without medication as long as you pay attention to life conditioning and improve bad habits. In your case, there is no need to take medication, but you should pay attention to the following points: 1, a reasonable diet, less greasy and spicy food, a light diet, and reasonable sleep without staying up late. 2, eat more vegetables and fruits to increase the intake of vitamins. 3, do not squeeze after the occurrence of acne, so as not to aggravate the infection or even leave pigmentation and scars. 4.When there are pustules or heavy infections, take oral antibiotics and apply anti-inflammatory creams externally. As for the marks left on the face, they are pigmentation and can disappear with time without treatment.