There are many clinical causes of fine hair. Simple fine hair is usually not due to kidney deficiency, but more to genetic factors. If fine hair is accompanied by symptoms such as premature graying, back pain and haggard complexion, it is mostly caused by kidney deficiency. In addition to genetic factors and kidney deficiency, fine hair is also associated with micronutrient deficiency and malnutrition. In addition, it is also related to improper care, such as excessive dyeing and perming, shampoo stimulation, excessive use of styling products, etc. Due to the long-term stimulation of external chemicals, the structure of the hair will be damaged, which may harm the hair follicles, resulting in fine hair. It is worth noting that endocrine disorders due to late nights, depressed moods and other reasons can also make hair fine and soft. For daily life hair care, you should change bad habits, endocrine regulation to restore normal, supplement nutrition and trace elements, including black sesame is a good hair care, medicine and food. Pay attention to avoid frequent dyeing and perming, choose the right shampoo and hair care products, avoid hair stimulation by too much heat, too much cold, etc.