Most of the hereditary hair loss refers to androgenetic alopecia, and taking finasteride is effective for male patients. Androgenetic alopecia has a genetic predisposition, is a non-scarring, the first hair often occurs in puberty and post-puberty, the main clinical manifestations of the follicle miniaturization as well as follicle progressive reduction, hair thinning, the proportion of fine hair increased. Finasteride can inhibit type II 5α reductase, which can inhibit the reduction of testosterone to DHT, thus improving the symptoms of male pattern baldness. In addition to oral medications, androgenetic alopecia can be treated with topical medications (5% minoxidil) and hair transplantation. Androgenetic alopecia, you need to go to the hospital in time for examination, all drugs should be used under the guidance of a professional doctor to avoid abusing drugs by yourself.