Cystic acne is a severe form of acne that can be improved with medication and physical therapy. 1. Medication: It is recommended that cystic acne patients take oral isotretinoin to inhibit the secretion of sebaceous glands, but it is prohibited during pregnancy and preparation. At the same time, it can be combined with topical retinoids, including adapalene and retinoid ointment. When the inflammatory reaction is strong, you can first take oral doxycycline, minocycline and other antibiotic drugs, which have the effect of anti-inflammatory and sterilization. 2. Physical therapy: cystic acne patients can also be combined with red and blue light irradiation of the diseased area, which can inhibit the propagation of Propionibacterium acnes, with anti-inflammatory effect. If necessary, combined with photodynamic therapy. Patients with cystic acne need to pay attention to local hygiene, a light diet and a regular routine. It is recommended to go to the hospital, cooperate with the doctor for standardized treatment, the specific use of drugs need to follow the doctor’s instructions.