There are many reasons for alopecia, which can be roughly divided into physiological alopecia and pathological alopecia.

1. Physiologically, such as pregnancy and childbirth;

Pathological, such as typhoid fever, pneumonia, dysentery, anemia and tumor. In addition, excessive brain use, malnutrition and endocrine disorders can also lead to hair loss.

Traditional Chinese medicine believes that the cause of hair loss is weakness of blood gas, meridian failure and inability to moisten; Or wind evil uses its meridians and blood gas changes; Or heat injury to blood vessels, or blood stasis.