Patients with acne on the forehead and back can adjust together from skin care cleaning, dietary adjustment, medication, physical therapy and other aspects. 1. Skin care and cleaning: patients can use mild cleansing products to remove excess oil and sweat on the chest and back, change clothes frequently, keep the skin fresh and dry, and avoid squeezing the acne. 2. Dietary adjustments: patients need to avoid spicy and stimulating foods, as well as high oil, high sugar foods, can eat more vegetables and fruits. 3. Medication: Patients can take oral antibiotics, such as minocycline capsules, roxithromycin capsules, etc., to inhibit the reproduction of Propionibacterium acnes, and use topical ointment, such as clindamycin phosphate gel, adapalene gel and so on. 4. Physical therapy: patients can choose red and blue light irradiation, photodynamic therapy, laser therapy and other ways to promote the elimination of acne. If patients need to use medication, they should use it under the doctor’s treatment plan, and should not use medication privately, so as not to cause damage to the body.