Girls head hair loss exposed scalp consider is androgenetic alopecia, baldness and other diseases, you can target specific diseases, take medication, surgical treatment, phototherapy and other treatments to improve the symptoms. 1. Androgenetic alopecia: oral cyproterone treatment; can also be used externally minoxidil tincture, to promote hair growth; drug treatment effect is not good, you can take hair transplantation surgery; drugs or surgery is ineffective in patients with severe alopecia, can be used to cover the hair piece. 2. Patchy baldness: local topical minoxidil solution can be used to improve local blood circulation and promote hair growth; the bald area can also be used externally or injected glucocorticoids to reduce inflammation around the hair follicle, such as prednisolone suspension, compound betamethasone injection, etc.; photoelectricity to improve the symptoms of patchy baldness. It is recommended that patients go to the dermatology department of regular hospitals for consultation, clear diagnosis, reasonable treatment under the guidance of professional physicians, and strictly follow the doctor’s instructions to use medication, not blindly self-medication.