Graying of hair is a physiological phenomenon, affected by congenital or acquired factors, and is not due to blood heat. Hereditary gray hair is less common, manifesting as gray hair at birth; neuropsychiatric disorders such as anxiety, emotional stress, etc. can contribute to gray hair; consumptive diseases such as tuberculosis, syphilis, malaria, etc. can contribute to gray hair; endocrine disease disorders, such as thyroid disorders, can also lead to gray hair; abnormalities of trace elements in the body such as lack of copper, zinc ions, etc. can cause hair to turn gray. There is a lack of specific treatment for hair graying, which is usually directed at the cause of the disease.