Long acne is often caused by excessive oil secretion blocking pores. At this time, cleanliness is very important. Wash your face with warm water (22-23 degrees) 1 min. Don't push too hard and then wash it with hot water (38-40 degrees) for 20 seconds. Dry the water with a dry towel and apply astringent emulsion. Always pay attention to the hygiene of the face and clean it thoroughly. Eat less or no irritating food, such as peppers, and greasy things. Drink plenty of water to keep your skin dry, at least 8 glasses of water a day, starting with the first glass of water when you get up. Don't use inferior and expired cosmetics, which is very harmful to the skin. Don't scratch with your hands, or you will leave a scar in the acne area.