Nails are the presence of every human body, one of the accessories of the skin, has a specific function to protect the end finger from damage, the nail bed is rich in blood supply, has the role of regulating peripheral blood supply, body temperature. In addition to this, we can also observe the health of the body through the nails. Because the nails are the “barometer” of health, once the nails are abnormal, then it is also a sign of our health problems. Normal nails are uniform in color, light pink. Nails are tough, moderately thick and thin, moderately soft and hard, not easy to break. The surface is smooth, glossy and free of layering and lines. If there are vertical lines on the nails, we not only want to know, what does the vertical lines on the nails represent? According to Chinese medicine, “the liver is the main tendon”, nails are part of the “tendon”, so toxins accumulate in the liver, there will be a corresponding reaction on the nails, which can easily lead to liver yin, liver blood deficiency, or liver function abnormalities, it is best to go to the hospital for further examination. If overwork and lack of sleep lead to more vertical lines on the nails, it is often related to over exertion of the liver. People with liver blood deficiency usually have symptoms of poor sleep or very light sleep. This is somewhat similar to the symptoms of kidney deficiency, but the difference lies in the fact that people with Liver Blood deficiency do not experience problems such as thirst and irritable heat. The liver is the organ that breaks down toxins. Only when there is enough liver blood, the toxins in the body can be broken down in time and the body will become healthier. To prevent liver damage, it is important to make adjustments to your life and diet to eliminate bad habits and reduce the likelihood of liver damage occurring. Protein can repair the liver, and eggs, tofu, milk, fish, chicken and other “high-protein, low-calorie” foods are the liver’s favorite. The rich proteins in these foods are like “repairmen” for the liver, working hard to repair liver cells and promote their regenerative effects. Protect the liver, there is another problem to pay attention to, is to live a regular life, can not stay up all night, staying up all night is the most harmful to the liver. Sex life can not be too frequent, to have regularity.