The nail is a barometer of health, different concave changes, different diseases nail concave changes, refers to the appearance of some horizontal lines, vertical lines and spots on the nail, etc.. According to Chinese medicine, this change in the nail is closely related to the low function of the body’s tissues and organs, the destruction of tissue structure, atrophy and other pathological changes. What is the problem with vertical lines on the nails? Vertical lines on the nails are mainly due to vitamin A deficiency. If the surface of the nail is not smooth enough and there are obvious vertical lines on the finger nail, they usually appear after overworking and overuse of the brain; these vertical lines will be clearly visible when there is a lack of sleep. There are vertical lines that may be poor digestion, many people have dense or sparse prismatic vertical lines on their nails, which is a reflection of poor digestive system function. Other experts believe that having ribs on the nails may be a sign of calcium deficiency. The liver and kidney function is weak, manifested as black vertical lines. A lack of oxygen in the body is manifested by blue vertical lines, which may be a sign of lung infection such as pneumonia. If the vertical lines are small, it does not matter much, just pay attention to diet, balanced nutrition and good daily health care. Eat a diet rich in high-quality protein, such as milk, eggs, beans, fish, etc., and take vitamins and trace elements such as zinc, iron, calcium, etc. to adjust the body functions, the vertical lines on the nail surface will gradually disappear. If the vertical lines persist, it may be a chronic disease of the internal organs. If the disease is not prevented, the nails will become uneven and even cracked as the condition develops. The nails are dented when the body lacks protein, calcium, sulfur, etc. The nails will appear dented. In this case, you need to supplement these types of nutrients from foods such as garlic and eggs. 2, nail brittle, cracked body lack of calcium, sulfur, zinc, or vitamin A, B, C, etc.; fingernails with prolonged contact with water; oral contraceptives; mental and emotional stress or chronic illness; the use of nail polish, abrasives, nails polished. These five conditions are likely to lead to brittle nails, cracks appear. 3, nails with horizontal lines The horizontal lines on the nails are a record of the lesions that have occurred. In other words, when there are horizontal lines on the nail, some lesions must have occurred in the body. Generally speaking, at the beginning, the horizontal lines are only at the bottom of the nail, but as the nail grows, it gradually moves upwards, which indicates that the onset of the disease is getting closer and closer. 4, nail spots A small amount of white spots on the nail is usually a sign of calcium deficiency, silicon deficiency or parasitic disease; a larger number of white spots may be a sign of neurasthenia; and yellow dots on the nail may be suffering from digestive system diseases; if black spots on the nail should be careful, the lighter is just overworked, malnutrition, the heavier may be a precursor of gastric prolapse, stomach cancer, uterine cancer. 5, the nail bed is red If the nail bed is red, beware of possible heart disease. If it is gray or white, it means that the red blood cells in the blood are low, probably due to anemia. 6, nail color white Nail color pale, lack of blood, mostly seen in malnutrition, anemic patients; in addition, if the nail suddenly becomes white, it is common to blood loss, shock and other emergencies, or hookworm disease, gastrointestinal bleeding, advanced tuberculosis, pulmonary heart disease and other chronic diseases. It should be noted that if the nails are as white as woolen glass, it is a characteristic of cirrhosis of the liver. 7, nail color gray nails are gray, mostly due to lack of oxygen, generally more common in smokers; and for non-smokers, nails suddenly become gray, the most likely is suffering from nail fungus, the initial nail edge will itch, followed by nail deformation, loss of luster into gray, such as gray nails. 8, the nail color becomes yellow nail yellow, in Chinese medicine is believed to be caused by damp heat fumigation, common in hypothyroidism, carotenemia, nephrotic syndrome, etc.; Western medicine is believed to be yellow nail most of the time with the lack of vitamin E in the body related. If all the nails turn yellow, it is necessary to receive treatment, because that is a sign of general weakness. The above changes in the nails are only one of the signs that indicate certain health problems in the body, and the final diagnosis of the condition requires more detailed examination and treatment.