Gray hair is usually caused by kidney deficiency, labor and blood injury, liver depression and qi stagnation (poor qi and blood transportation of the liver, emotional depression). 1. Kidney deficiency: Chinese medicine says that the kidney its Hua in the hair, when there is a kidney deficiency, it is easy to have more gray hair, and accompanied by tinnitus, lumbago and other symptoms. 2. Labor and injury to blood: hair for the blood of the remaining, when labor and injury to blood, hair will be easy to white, and accompanied by insomnia, forgetfulness and other symptoms. 3. Liver depression and Qi stagnation: Liver depression and Qi stagnation can easily lead to poor blood and Qi operation, resulting in the hair does not honor and early white, and accompanied by symptoms of depression, this time should maintain a good state of mind, do not over-anxiety. It should be noted that if the elderly have more gray hair, is a normal physiological phenomenon, do not worry too much. If the young people have more gray hair, should be under the guidance of the doctor’s diagnosis and treatment, not unauthorized use of medication.