It is the number of pigment particles in hair that determines the color of hair, which is related to the development and growth of pigment cells in the papilla of hair roots. Hair turns from black to white. Generally speaking, the function of pigment cells in hair decreases. When it drops to the point where it can't produce pigment particles at all, the hair turns completely white. Normal people began to decline at the age of 35. And some people are white at the age of 20. In medicine, they are called juvenile white hair, commonly known as "juvenile white head". The causes of baldness are complicated, which are related to both genetic and physical factors, as well as various acquired factors. Congenital baldness The most common people with this kind of baldness often have a family history, and often have white hair at birth, or their hair is whiter than others. In addition, there is no other abnormal performance. Baldness the day after tomorrow. There are many reasons: malnutrition, such as lack of protein, vitamins and some trace elements (such as copper), will make hair turn white; Some chronic consumptive diseases such as tuberculosis. Due to lack of nutrition, hair turns white earlier than ordinary people; Some patients with long-term fever, hair will turn yellow and brittle or even white and fall off; Some endocrine diseases, such as pituitary or thyroid diseases, will affect the ability of pigment cells to produce pigment particles, leading to premature whitening of hair; Encephalitis, neuropathy, etc. It can also make hair white; The skin, hair and eyebrows of albinos are all white; The disease of skin whitening-"vitiligo", if it happens on the scalp, the hair will also turn white; Others believe that the more you use your brain, the faster your hair will turn white; Some young people's hair turns white in a short time, which is related to severe mental trauma or mental fatigue such as excessive anxiety and sadness. Clinical manifestations of baldness: onset in adolescence or adolescence; At first, there was a small amount of white hair in the hair, most of which first appeared at the back or top of the scalp, mixed with black hair in a gray shape; Subsequently, white hair can gradually or suddenly increase, but it will not all turn white. Some people keep their white hair from increasing for a long time; Generally no conscious symptoms; Sudden onset may be related to malnutrition; Some patients unconsciously reduce or even disappear white hair after the inducing factors are eliminated; Some people even turn their beards white, and Chinese medicine says their hair needs to turn white early. "Little white head" may be related to DNA damage: it is normal for people to have gray hair when they are old, but what is the reason for young people's gray hair? Not long ago, a study by Inner Mongolia Medical College proved that the occurrence of "juvenile baldness" may be related to DNA damage. The researchers selected 20 young people with non-hereditary "baldness" and 20 normal people as the research objects. They used sister chromatid exchange (SCE) analysis and micronucleus detection technology to detect the cellular DNA of two groups of young people. The results showed that the average SCE and micronucleus rate of "Shaobaitou" group were 7.29 and 5.065438 0 ‰, which were significantly higher than those of the control group (6.25 and 2.45‰), and the difference between the two groups was significant. The SCE and micronucleus rates in the "Shaobaitou" group were significantly higher than those in the normal group, suggesting that the occurrence of "Shaobaitou" may be related to D NA injury. Prevention and treatment of baldness: pay attention to the regulation of diet, not partial eclipse, and eat more foods rich in vitamins such as miscellaneous grains, beans, vegetables and fruits, animal liver, persimmons, tomatoes, potatoes, spinach, peanuts, eggs and other high-protein foods; This disease doesn't mean getting old before you get old. Don't worry. You should keep a calm, open-minded and cheerful mind, combine work and rest, and avoid mental stimulation and stress. Actively treat various chronic diseases and eliminate obstacles to the formation of melanin particles. Reasonable diet to prevent white hair: the prevention of white hair should pay attention to the following aspects: pay attention to diet and nutrition. Staple food can often eat beautyberry rice, black beans, red beans, mung beans, Hong Ling, black sesame seeds, walnuts and so on. Vegetables often eat carrots, spinach, purple radish heads, purple cabbage, mushrooms, black fungus and so on. Animals often eat black-bone chicken, beef, sheep, pig liver, soft-shelled turtle, dark fleshy fish, sea cucumber and so on. Fruits often eat jujube, black dates, persimmons, mulberries, purple grapes and so on. In short, all dark-colored foods (green, red, yellow and purple) contain pigments formed by the interaction between natural plants and sunlight, which can supplement the human body's pigments and be beneficial to the health care of hair color. In addition, pay attention to ensure adequate protein and vitamins. Eat more vegetable oil, less animal fat and less sugar. You can use a small amount of honey or brown sugar instead. Severe white hair should be treated in time, keep a good mood, and don't be overly nervous and tired. Why hair turns white is a physiological phenomenon. The activity of melanocytes in the hair ball is lost, which makes the pigment in the hair shaft disappear. Early white hair before old age often has a family history and is autosomal dominant inheritance. Pernicious anemia, hyperthyroidism, cardiovascular diseases, etc. , are prone to white hair. Severe emotional influence can make hair turn white quickly. Long-term suffering from tuberculosis, malignant tumors, gastrointestinal diseases, diabetes, etc. will also make white hair appear in advance. Malnutrition and lack of protein will make hair hypopigmentation brown or gray, and lack of essential fatty acids will also make hair pale. Lack of copper, vitamin B, folic acid and benzoic acid can make hair turn white. Too much sugar will make your hair yellow. Hypogonadism can lead to premature gray hair.

Satisfied, please adopt.