Acne prevention and precautions are as follows: 1, to combine work and rest, relax. Because of tension, more androgens will be secreted, which can easily lead to acne. 2, pay attention to life and living, less late at night, to maintain the normal body immune function and oil secretion state; 3, pay attention to diet, eat more vegetables and fruits, less spicy, greasy, sweet food; 4, strengthen facial cleaning. Wash your face with warm water daily to cleanse your skin. Those with more oil secretion can use a cleanser to remove oil. After acne, do not rub your face or squeeze it with your hands, as this will aggravate the condition and leave scarring and pimple marks. 5, women should not wear heavy makeup as much as possible, and keep the hair follicle opening open.