In summer, we should arrange three meals a day according to the standard of "no sugar and less oil", drink less coke, juice and espresso, eat less chocolate, candy, cream cake and fried food, and eat less raw onions, garlic and peppers. This can reduce the intake of sugar, oil and irritating food. At the same time, when arranging meals, you can prepare more foods rich in dietary fiber, such as sweet potatoes, bamboo shoots, celery, etc., to keep the stool unobstructed. Because constipation will aggravate acne. In addition, it is also important to properly supplement vitamins to prevent acne. Among them, proper vitamin A supplementation can effectively control the secretion of sebaceous glands and reduce the shedding and keratinization of epidermal cells, while foods rich in vitamin A mainly include: soybeans, eggplant, Chinese cabbage, radish, spinach, green onions, carrots, pumpkins, tomatoes and so on. Secondly, proper vitamin B supplementation is also very beneficial to the prevention and treatment of acne. Among them, vitamin B2 can effectively inhibit the occurrence of seborrheic dermatitis, vitamin B6 is an important component of essential coenzyme in fat projector, and vitamin B 1 can help digestion. Eat more foods rich in B vitamins, especially foods rich in vitamins B2 and B6, such as animal liver, eggs, laver, soybeans, peas, yeast, chicken, beef, lean meat, carrots, bananas and grapes. It is very suitable for vaccination.