There are many reasons for the whitening of sweat hair, including endocrine diseases, nutritional deficiencies, mental stress, etc., as follows: 1. Endocrine disorders such as abnormal thyroid function can lead to abnormal metabolism, premature aging, whitening of sweat hair and other symptoms, it is recommended to go to the hospital in a timely manner to do an endocrine examination and active treatment. 2. The color of sweat hair has a relationship with nutrition, malnutrition or nutritional imbalance, vitamin B deficiency, can also lead to the color of sweat hair pale or even white. It is recommended to have a balanced diet to prevent malnutrition. Some chronic wasting disease such as chronic atrophic gastritis or chronic colitis can also lead to nutritional deficiencies, it is recommended that we must cooperate with the doctor to do treatment, according to the cause of the disease to do targeted treatment. 5. Mental stress, such as sudden major events on the physical and mental impact of a large, caused by mental stress, may be triggered by the white hair. Usually pay attention to maintain balanced nutrition, pay attention to regular work and rest, avoid staying up late, to participate in sports. If you are under stress, you need to relax properly and avoid excessive tension.