Adolescent long acne closed mouth, usually do a good job of skin cleansing, pay attention to diet regulation, and under the guidance of a professional dermatologist topical topical ointment or oral medication, etc., to promote the elimination of closed mouth acne. Adolescent children are prone to acne, with closed mouth acne being the most common, mostly on the forehead, hairline and other parts of the body. If you have closed mouth acne, it is usually best to wash your face with lukewarm water and then rinse it off with cold water. If your skin is not oily, you may not need to use facial cleanser and apply ointment under the guidance of a professional doctor, such as tazarotene gel, adapalene gel, etc., to improve and eliminate the effect. If you have acne closed mouth during puberty and it is more serious, you should take medication to improve it under professional doctor’s guidance, such as isotretinoin soft capsule, etc., which helps to eliminate acne closed mouth. Normally, the diet should be based on light food, do not eat too greasy, spicy or stimulating food, eat less or no seafood, so as not to cause skin allergies or lead to acne aggravation. Moreover, it is best to maintain a regular routine, do not stay up late, and try to improve the skin condition. If acne is serious, it is recommended to go to the hospital to receive standardized diagnosis and treatment.