Can nails reflect physical problems?

Many people think that health will be directly reflected in nails: for example, white spots on nails are warning signals from the body, and the size of small white circles at the bottom of nails is also closely related to health ... Can a small nail really reflect health problems? Is there granular malnutrition on the nails? Many people's fingernails are not smooth, with obvious horizontal stripes or vertical stripes, which feel like ravines. For this phenomenon, most people think it is a sign of malnutrition. Expert judgment: There are many reasons for the wrong statement, which cannot be generalized. It is believed that the nail surface should be ruddy, curved, smooth and shiny under normal circumstances. Vertical lines on nails are generally caused by overwork and excessive brain use. Especially when there is insufficient sleep, vertical stripes will appear obviously. At the same time, vertical stripes will also appear when people suffer from neurasthenia or decreased human immunity. Therefore, the vertical stripes on nails are actually a manifestation of sub-health, reminding people to recuperate their bodies and adjust their work and rest time and diet structure. The cause of striation is different from that of vertical striation, which may be a precursor of nephropathy or myocardial infarction. When there are horizontal stripes on the nails, there must be some pathological changes in the body. Professor Cui from the Department of Hand and Foot Surgery, Sino-Japanese Friendship Hospital of Jilin University reminded people that we should not ignore the appearance of horizontal stripes on nails, because this may be an early warning from the body, and we should go to the hospital for physical examination and treatment as soon as possible. The bigger the crescent moon, the healthier the body? The crescent moon mentioned here is a small white semicircle at the bottom of the nail. Many people think this is a reflection of health. The bigger the new moon, the healthier the body. Expert judgment: wrong view, moderate size is healthy. Professor Cui said that this crescent moon, whose scientific name is one and a half months, can really reflect the health of the body, but the bigger the better. Healthy people, whose color is milky white in the first half of the month and the size is moderate, should account for 1/5 of the whole nail (it is better to have five fingers, and the other four fingers are not necessarily a big problem on the thumb). Traditional Chinese medicine believes that the liver stores blood, and the quality of blood circulation will directly affect the function of the heart, and the liver lies in people's nails. Therefore, people with crescent moon are full of qi and blood and have smooth blood circulation. On the contrary, their qi is weaker and their blood circulation may not be very good. It can be inferred that it is abnormal to be too big or too small or vague, and people who are too big are prone to hypertension, stroke, cardiovascular and cerebrovascular diseases; But if the first half of the month is too little, it is easy to suffer from acute pneumonia, asthma, digestive system diseases and hypotension; People who can't see for a month and a half have symptoms such as anemia or neurasthenia. At the same time, we can also see the problem from the color of half the moon. When it is blue, it implies that there is a problem with the respiratory system and it is easy to suffer from cardiovascular diseases. Blue is a sign of poor blood circulation. Is the white spot on the nail due to calcium deficiency? Some people have small white spots on their nails, which many people think is caused by calcium deficiency. Expert judgment: There is a certain basis, but external and internal factors need to be judged.