Thinning hair can be caused by androgenetic alopecia, baldness and other diseases, and can be improved by general treatment, medication and other ways. Very few patients have congenital hair thinning, which can be improved by hair transplantation. 1. Androgenetic alopecia: If hair thinning is caused by androgenetic alopecia, male patients can follow the doctor’s instructions to take finasteride to promote blood circulation in the scalp and improve hair loss. Female patients take spironolactone, cyproterone and other drugs to inhibit androgen synthesis, but pregnant and lactating women should be used with caution, but also need to cooperate with topical minoxidil, stimulate hair follicles, help hair growth. 2. Patch baldness: If hair thinning is caused by patch baldness, the patient can follow the doctor’s instructions for local injection of compound betamethasone, trimethoprim and other drugs to inhibit inflammation around the hair follicle, with the systematic oral cystine, calcium pantothenate, vitamin B and so on, which can help to grow hair. Minoxidil can also be used topically to promote hair growth. 3. Congenital hair thinning: a very small number of patients belong to the congenital hair thinning people, it is recommended to pay attention to daily scalp sunscreen, avoid excessive perming and dyeing, you can take hair transplantation to improve hair loss. There are many reasons for hair thinning, it is recommended that patients go to the hospital, clear the cause of the disease after treatment.