Hair loss is caused by:

Alopecia is divided into physiological alopecia and pathological alopecia, physiological alopecia does not need special treatment, pathological alopecia more common there are three kinds: 1. Androgenic alopecia, is due to excessive oil secretion, resulting in hair loss gradually, hair follicle atrophy;2. telogen alopecia, refers to the body in emergency situations to show hair loss, such as: excessive weight loss, postpartum, etc.;3. skin diseases caused by, such as: lupus alopecia, lichen planus alopecia, syphilis caused by hair loss. Therapeutically, male patients can take oral antiandrogens and female patients can take oral spironolactone.