Red patches on the head may be due to seborrheic dermatitis, psoriasis, tinea capitis and other factors, need to clarify the cause of the disease, targeted treatment, common treatment modalities are ketoconazole, tretinoin, itraconazole and other medications, light therapy, bath therapy and other physical therapy. 1. Seborrheic dermatitis: its etiology is complex, may be related to malassezia, sebum level and immune response and other factors, preferably in the face, scalp, chest and other parts of the face, manifested as erythema, dandruff, may be accompanied by itching. Shampoo containing tar, zinc pyrithione and ketoconazole can be used to wash the hair, and oral itraconazole and other antifungal drugs can be used to treat the disease if necessary. 2. Psoriasis: commonly known as “psoriasis”, is due to the interaction of environmental factors, genetic factors, immune factors, etc., can be limited to one place, may also be distributed throughout the body, the main manifestation of the skin scaly erythema or plaque. Tinea capitis can be treated with drugs such as tretinoin, mometasone, carbotriol and biological agents according to the condition, and physical therapy such as phototherapy and bathing therapy can also be carried out. 3. Tinea capitis: it is caused by dermatophyte infection of the scalp and hair, mostly manifested as itchy scalp, hair loss, scaly lesions and other symptoms. Oral itraconazole, terbinafine and other medications can be taken, but also assisted by clotrimazole, miconazole and other topical antifungal drugs, in order to reduce the rate of bacteria, infectious. Red patches on the head may also be caused by other factors, it is recommended that patients seek medical attention in a timely manner, and actively carry out relevant examinations in order to clarify the cause of the disease, targeted treatment, to avoid private medication, so as not to delay the condition.