Patchy baldness on the back of the head can be treated with medication and physical therapy, and at the same time, it is also necessary to pay attention to improving the lifestyle to control the development of the disease. 1. Medication: The onset of baldness is related to heredity and immune function disorders, which will lead to specific local immune reactions, causing hair loss and abnormal growth. You can apply minoxidil tincture, dithranol ointment and other drugs as prescribed by the doctor, and if the condition is serious, you need to take prednisolone acetate tablets, methylprednisolone tablets and other drugs for treatment. 2. Physical therapy: Physical therapy such as excimer laser and photodynamic therapy can be applied to improve the symptoms of baldness by inhibiting the immune response and acting directly on the local area. 3. Improvement of life style: In the treatment, it is also necessary to pay attention to the improvement of life style, maintain emotional stability, avoid excessive mental stress, and also need to develop good sleep habits to ensure sufficient sleep. It is recommended that patients with pemphigus vulgaris should go to the hospital in time and follow the doctor’s instructions to standardize the treatment, and should not use drugs blindly to avoid aggravation of the condition.