Hair is a sign of beauty and health, and has a close relationship with the body, protecting good hair is to protect the body and health. With the development of the current society and the progress of the times, people pay more and more attention to the beauty of hair, who are eager to have a dark and shiny hair. However, due to the high pressure of work and irregular life, the number of people with hair loss is increasing in recent years and the age is getting younger and younger. Preventing hair loss and popularizing hair-related knowledge is a very necessary task to make people realize that hair health is body health, and hair lesions are the alarm signal of the body’s sub-health status. Ancient doctors compared the hair to a mirror of the human body, that hair can reflect the body’s vitality and internal organs function, hair and the body is closely related. Hair function 1, the hair has a protective effect on the head, the head injury plays a cushion role. 2, summer hair can resist the sun, reduce the damage to the scalp and brain in the strong light of infrared and ultraviolet light, winter has a warming effect. 3, hair is also a kind of excretory organs, can excrete water heat detoxification, if the human body has damage to the health of heavy metal elements such as arsenic, mercury, etc. can be excreted from the hair out of the body. 4.Determine the disease. We test the amount of zinc, copper and other trace elements in the hair to provide evidence for the diagnosis of disease. 5.Identify the ethnicity to understand the living environment. According to the content of hair melanin, then you can determine whether it is black, yellow or white. 6.Beauty effect. A dark and shiny hair, beautiful hairstyle can often show a beautiful, dignified external temperament. The relationship between hair and emotional changes Chinese medicine believes that hair changes have a close relationship with mental and emotional. Major mental stimulation, excessive depression, thinking, often cause premature graying of hair and hair loss. The “Thousand Gold Formula” says “early graying of hair due to sorrow”, and the “Essentials of Life” says “anger and the hundred veins are unstable and hair is pale and scorched, and too much thinking is depleted of energy”. It can be seen that the seven emotions can cause disease, can also lead to premature gray hair loss. Therefore, moderation of emotions, avoid over-stimulation of the seven emotions, keep a cheerful mood, calm and optimistic good self-nurturing, regular life, can promote physical health, conducive to hair growth. Hair and aging Hair graying is a sign of aging, as the saying goes, “people get old from the head first, more white, less black”. From the hair, we can generally see the evolution of the kidney’s essence. According to the Nei Jing, at the age of eight, the essence of the kidney begins to fill up, and the hair grows long; at the age of forty, the essence of the kidney begins to decline, and the hair begins to gray; at the age of forty-eight, the hair turns white at the temples; at the age of sixty, the essence of the kidney declines even more, the hair turns white, the body becomes heavy, and the walk is not correct. It can be seen that the essence of the kidney dominates the whole process of growth, development and aging of the human body. In general, the degree of aging can be inferred from the hair. However, there are also those who have white hair as a teenager and those who have black sideburns as an old man, which are different from the endowment. Clinical significance of hair changes According to clinical observation, there are many causes of hair loss and different types. Physicochemical factors: strong acid, strong alkali have damage to the hair, try to less dyeing, less perm, do not use high-powered hair dryer blowing hair. Hair loss is aggravated when the normal functions of the body are temporarily dysfunctional, or when suffering from certain endocrine disorders. Examples include hyperthyroidism, hypoadrenalism, chronic anemia, tuberculosis, diabetes, etc. Certain chemical drugs such as cyclophosphamide, nitrogen mustard, colchicine and other drugs can also cause chronic hair loss, the hair gradually reduces, dry and easy to fall out. There are also many other factors that cause hair loss, such as a decline in body immune function, endocrine disorders can appear spot baldness; hormone level disorders can appear seborrheic alopecia. Therefore, if you find hair loss, you must go to a regular hospital to find the cause of hair loss and diagnose it clearly so as not to delay the treatment. It can be seen that maintaining a healthy body and a regular life is an important prerequisite to ensure normal and perfect hair. Knowledge of hairdressing and hair care (1) to avoid evil aggression, pay attention to the daily cleaning of hair, keep hair clean, reduce the pollution of harmful substances, is the premise of normal hair growth. (2) keep the hair adequate nutrition, hair is also alive, must be given adequate nutrition. The main component of the hair is protein, protein accounts for 98% of the hair stem, so daily life should be balanced nutrition, do not be partial diet. (3) diet should be moderate. Such as paste and thick taste, diet strong wine and tea, greasy food can lead to hair malnutrition and abnormal. (4) prohibit poor quality chemical shampoo and hair dye poor quality chemical shampoo and hair dye, will damage the hair hair quality, long-term use of toxic substances into the body, destroy the hematopoietic ito, to our body caused significant damage. Carcinogens can easily enter the capillaries along the scalp and enter the bone marrow with the blood circulation. Long-term repeated use can destroy the hematopoietic stem cells and cause leukemia, and mild poisoning can also cause skin allergies. Chinese medicine believes that the head is the meeting of all the yang, the bottom of the clear yang, thought the sea of the brain is located. Where the essence of the five organs of the fluids, the six bowels of the essence of Yang, are injected into the head, so the hair is moist and scorched or soft and the internal flow of Qi and blood, the function of the viscera has a close relationship. Therefore, hair care is to maintain health.