The presence of one or more raised vertical lines on the nail surface often indicates a person’s good or bad health. They appear when the person is physically exhausted and mentally tired continuously. The number and depth of longitudinal nail lines gradually increase in middle age, which is a sign of aging. The appearance of longitudinal nail lines in young people indicates a pathology of the respiratory or nervous system. Longitudinal lines may also appear in young children due to nutritional imbalance caused by partial eating. Specific manifestations and notes: 1. It is a normal physiological phenomenon; 2. It is a manifestation of vitamin A deficiency; 3. It is a symptom of iron deficiency anemia, usually accompanied by pale or yellowish complexion, easy fatigue, general weakness, panic, headache and so on. In addition to the above symptoms, severe patients may also have stomatitis, tongue inflammation, stomatitis and swallowing difficulties; 4. Long-term mental tension and severe sleep deprivation. It is a proof of overwork and overuse of brain; 5. It may be caused by trauma, and any slight damage may leave traces; 6. It indicates chronic inflammation in a part of the organism’s tissues and organs. It may be reduced kidney function, pancreatitis, long-term inflammation of the small intestine, rheumatism, etc. Other pathological explanations: brown longitudinal lines or longitudinal cracks on the surface of the nail, extending from the fingertip to the root of the nail, that indicates the presence of inflammatory intestinal lesions or predicts vitamin deficiency and iron deficiency, etc. Partial whitening of the nail indicates zinc deficiency. General whiteness indicates anemia. A brownish-yellow stripe on the nail is a sign of liver disease. It is important to note that this brownish-yellow streak should appear on all ten fingernails at the same time in order to be liver disease; if it only appears alone, it is not a basis for diagnosis and may be a feature of rheumatoid arthritis. The actual nails are not only a good way to get the most out of your nails, but also a good way to get the most out of your nails. Additional knowledge: The nail of a healthy person is shiny, smooth, translucent, uniformly light red, with a certain curvature attached to the end of the finger. In its root there is a half-moon white nail arc, the nail to play a protective role, commonly known as “health circle child”, the nail shape, luster, color changes, can reflect the health of the body, put ten nails in the sunlight observation, finger up and down, such as the nail surface has a shining reflection, that shows the overall health in The overall health of the body is in excellent condition, the function of the organs are intact and normal. Other conditions: People with short nails have a weak heart and are susceptible to infections from the abdomen to the lower back and lower body. If the tip of the nail is flat and embedded in the flesh, you may be prone to neuralgia and rheumatism. People with narrow lower nails are prone to diseases of the spine and other bones, especially those with very soft nails, and are always very deficient in calcium. People with shell-shaped nails should pay more attention to minor spinal cord and nervous system problems. Too many white dots on the nail is a sign of nervousness, and yellow dots indicate a digestive system disease. Small grains on the nail are a sign of drug poisoning or parasites in the body. A large half-moon at the bottom of the nail indicates rapid blood circulation. If it is small, the blood circulation is not good, and in case of extreme anemia, the half-moon shape will disappear completely. The horizontal line on the nail is a dangerous condition. At the beginning, the horizontal line is only exposed at the bottom of the nail, and gradually moves upward as the nail grows. If there are many small thimble-like pits sunken into the nail, it is most likely an advanced manifestation of psoriasis. A swollen finger with a purple halo on the nail is likely to be a lung disease. A thinning and brittle nail, or even splitting, indicates respiratory and circulatory system disease. A nail that is sunken in the middle, shaped like a spoon, indicates diabetes, anemia, hyperthyroidism or malnutrition. A dark red-purple blood spot under the nail often indicates purple epilepsy or blood disorders. Crossed nails: Mostly caused by a lack of nutrition, but may also appear after surgery or heart attack. In addition, cross-striped nails are often an important indicator of intestinal infections and pneumonia. Some people may also develop this symptom after measles or fever, or before the onset of a myocardial infarction. Cottony white clouds and white dots on the nails: possible intestinal problems. Soft and unstable nails: a sign of malnutrition. Flat, sunken, spoon-shaped nails that are lusterless and fragile are iron deficiency anemia. Raised nails: The nails are highly curved and raised by the transverse and longitudinal ridges. Many diseases can cause raised nails, such as chronic lung disease, congenital heart disease, thyroid disease, cirrhosis of the liver, ulcerative colitis and certain malignant tumors. Spoon nail: nail thinning, the central depression, the edge of the warped like a spoon called spoon nail, spoon nail common in hypochromic anemia, long-term iron deficiency or hyperthyroidism, hyperadrenalism, rheumatic fever, hookworm disease, syphilis and other diseases. Round nails: People with heart disease, lung disease, chronic hypoxia, liver atrophy or kidney failure are likely to have round nails. Inverted triangular nails: indicate a tendency to suffer from stroke and paralytic diseases. Cracked nails: People whose fingers are frequently exposed to detergents are more likely to have cracked nails, but otherwise they may have a functional thyroid gland, a blood circulation disorder or a serious skin condition. Cyanotic nails: Usually due to lack of oxygen, or if systemic, due to lack of oxygen in the arterial blood caused by congenital heart disease, chronic lung disease, heart failure, and other diseases. White nails: If the nails all turn white, they are pale for cold deficiency and pale for anemia. Nails are green: Patients with acute abdominal disease have cold extremities and their nails will suddenly turn blue.