13-year-old girl face acne, generally is the old people mouth said pimples, clinically known as acne, is currently believed to occur with the puberty hormone secretion level changes in the body of the greater cause, can be improved through the improvement of diet, local cleaning, regular rest and relaxation and other methods to improve. 1. Improve your diet: Drink as much water as possible during puberty, eat more fresh fruits and vegetables, and avoid spicy, greasy and irritating foods, or else the sebaceous glands will be prompted to secrete, and the face of the pimples will further increase. 2. Local cleaning: long acne need to pay attention to the facial skin cleaning to be in place, you can use a mild non-irritating cleanser to clean, help to remove excessive oil, so as not to aggravate the symptoms of acne. 3. Regular work and rest: to go to bed early and get up early, to ensure adequate sleep, appropriate relief of stress and bad mood, through listening to music, chatting, walking and other ways to maintain a pleasant mood. 4. Medication: If acne occurs, it can be treated with topical medication such as Vitamin A cream under the guidance of a doctor. The above medications should be used under the guidance of a doctor, please do not take medication without authorization to avoid danger.