Hair loss can be caused by seborrheic alopecia, baldness, ringworm, etc. In order to prevent hair loss and hair growth, patients can be treated with oral medication or topical medication under the guidance of doctors. 1. Seborrheic alopecia: Seborrheic alopecia usually manifests itself in the form of fine, thinning hair and greasy hair. Minoxidil tincture can be used externally to promote hair growth, and vitamin B6 tablets can be taken orally to regulate the secretion of oil. 2. Patch baldness: The formation of patch baldness is usually related to autoimmune and mental factors. It can be treated with topical minoxidil tincture and oral cystine or vitamin B to promote hair growth. 3. Tinea capitis: Tinea capitis is caused by a fungal infection of the scalp. In the treatment, you can use topical antifungal drugs, such as ketoconazole lotion, terbinafine cream and so on. For patients with hair loss, it is recommended to go to the hospital in time for examination, and at the same time under the guidance of the doctor to prevent hair loss as well as hair regrowth treatment.