Repeated growth of closed mouth acne on the face can be improved by adjusting the lifestyle and dietary habits, physical therapy, medication and so on. 1. Adjust the dietary habits: avoid staying up late for a long time; quit smoking and drinking; keep the face hygienic and clean; pay attention to a light and balanced diet, do not eat spicy, stimulating, greasy food. 2. Physical therapy: you can give red and blue light irradiation, which is conducive to improving the symptoms of closed mouth acne. 3. Medication: you can apply topical retinoic acid ointment, benzoyl peroxide gel, adapalene gel, etc.; you can also take oral isotretinoin soft capsule for treatment. These drugs can have different degrees of adverse reactions, such as photosensitive reactions, skin irritation, allergies, dizziness, etc. When using these drugs for treatment, be sure to follow strictly the instructions under the guidance of a doctor.