There are many clinical causes of gray hair, not necessarily caused by kidney deficiency, kidney deficiency is only one of the common causes, there may also be physiological gray hair. The common clinical cause of gray hair is kidney deficiency, mainly due to overwork, staying up late, irregular diet, resulting in liver and kidney deficiency, lack of essence and blood, in addition to gray hair, can also be accompanied by memory loss, lack of concentration, lack of energy, reduced work efficiency, emotional often difficult to self-control and other symptoms. A small percentage of gray hair is caused by other reasons, such as liver depression, which is usually closely related to emotions. In addition to this, as we grow older, the phenomenon of gray hair can also occur, this situation is a normal physiological phenomenon, do not need to worry too much. For the care of white hair is to supplement the kidneys and fill the essence, moderate consumption of kidney food, such as black beans, black sesame, and so on, and keep a relaxed mood, to develop good habits of life and rest.