1. Yellow nails: This condition is most commonly caused by a fungal infection. If the infection worsens, the nail bed will shrink and the nails will become thicker and more brittle. In addition, a serious thyroid disease or bullous disease may cause yellow nails to appear after. 2, white nails: nails are white in a large area, and the surrounding color is darker, is a sign of liver disease, such as hepatitis. The yellow color of the finger in the picture is likely to be another sign of liver disease. 3, nail breakage: nails become dry and prone to breakage, may be a sign of thyroid disease. If the nails are yellow and brittle, it may be a fungal infection. 4, nail unevenness: This may be the early symptoms of suffering from psoriasis, inflammatory arthritis performance. Among the patients with psoriasis, 10% of them have nail parts that start to show symptoms of the disease. 5. Black streaks under the nails: If this happens, you need to go to the hospital as soon as possible to check if it is due to melanoma. Melanoma is a very dangerous skin disease, and is also an early symptom of skin cancer. 6.Dull nails: In addition to aging, anemia, diabetes, liver disease, congestive heart failure or malnutrition can cause dull nails. 7, blue streaks on the nail: this nail condition is a manifestation of insufficient oxygen supply in the body, may be suffering from lung infection, such as pneumonia signal. 8, nail fold raised: If the skin around the nail is red and swollen, it is a sign of inflammation of the nail fold. This condition is caused by factors such as lupus and connective tissue disorders. 9, the relationship between age and crescent marks “crescent marks” is called crescent for short, also called health circle. The crescent will become smaller and shorter with age, and the color will become darker from white. So, what is the relationship between the crescent and age? 1. A healthy person, at the age of 30, should maintain 8 to 10 lunulae on the finger; 2. At the age of 40, there should be at least 6; 3. By the age of 60, there should be at least 1 to 2. Usually, maintaining 8 to 10 is the ideal condition. The crescent teeth on people’s fingers will be reduced or lost with the occurrence of physical diseases, and once the body recovers, the crescent teeth will grow back slowly. The larger the crescent is, the better. In healthy people, the crescent area is roughly 1/5 of the nail. If the crescent area is less than 1/5 of the nail, it indicates a lack of energy and poor gastrointestinal absorption capacity. If the crescent suddenly becomes obscure, shrinks, or disappears, it often means that you are suffering from a wasting disease, or a tumor, internal bleeding, etc. When the crescent is larger than 1/5, it mostly means cardiac hypertrophy and susceptibility to cardiovascular, hypertension, stroke and other diseases. It can be said that the crescent is the “barometer” of human health. Half-moon mark – abnormal Cold bottom type No half-moon mark is a cold bottom type. The fewer the half-moon marks, the worse the energy, the lower the function of the internal organs, the slow movement of qi and blood, easy fatigue, weakness, poor absorption, pale face, cold hands and feet, panic, drowsiness, easy to catch a cold, repeated colds, energy loss, physical decline, and even phlegm-damp stagnation, qi stagnation and blood stasis, phlegm-damp nodules, tumors, etc. Hot bottom type Those who have half-moon marks even on the little finger and enlarged half-moon marks are all hot bottom type. This type of person has a strong internal organ function and good health. However, in pathological cases, the Yang energy is strong and the internal organs are hyperactive. They may see redness, fire, irritability, constipation, irritability, dry mouth, large food intake, not afraid of cold, good movement, and even high blood pressure, high blood sugar, and stroke. Alternating hot and cold type (yin and yang disorder type) If the boundary of the meniscus is blurred and the color gradually approaches the color of the nail body, it is the alternating hot and cold type or yin and yang disorder type. The alternating hot and cold type suggests that there are changes of yin and yang in the body, and the changes of hot and cold may vary depending on the maintenance. As the saying goes, “people with sufficient essence are strong (half-moon marks are sufficient), people with weak essence are sick (half-moon marks are discolored), and to sum up, people with little essence are old (half-moon marks are less), and people with exhausted essence are dead”. People without half-moon marks need to replenish their bodies quickly even if they are not sick for the time being. Especially when only the thumb has half-moon marks, the body is telling you that you have used the “bottom oil”, need to quickly add “oil”! Health care advice: the energy supplement depends on high-quality neutral protein, such as milk, eggs, beans, fish and black food, seeds, embryonic food, as long as to ensure nutrition, adhere to the maintenance, generally 1.5 months in a nail growth, usually first thumb, after the index finger, middle finger, ring finger, little finger, six months later to grow full. However, usually pay attention to rest, if you stay up late for a long time, then excessive night life half-moon marks will disappear again soon. Erythema nail The appearance of red spots under the nail indicates capillary bleeding, the cause of which may be due to high blood pressure, skin disease, heart infection or the presence of some potentially serious disease. White spots The frequent appearance of white spots on the nails of children is most often due to gastrointestinal stagnation, indigestion or worm accumulation or calcium deficiency, and may be worm spots, indicating the presence of worms in the body. If white spots appear on the nails of adults, they are a sign of nutritional deficiency. Most often seen in liver function metabolism or impaired, especially in chronic patients with hepatitis B. Habitual constipation, which causes long-term gastrointestinal disorders can also appear dotted white spots. Longitudinal nail Many people overwork, sleep deprivation, and neurological weakness can lead to longitudinal nail lines, and special attention should be paid to health conditions. If the longitudinal lines have always existed, the immune function is poor, there are chronic lesions in some organs in the body, may be the first signs of liver disease; elderly people’s nails if the longitudinal lines appear, is a symbol of long-term neurasthenia, the body aging. If you have deep and thick horizontal lines, it indicates a serious disease. The nail is usually malnourished, but it can also be caused by staying up late or eating irregularly. Those with many and thin horizontal lines on the nail are most often seen in long-term chronic digestive diseases. If you are not careful with your diet, you may have abdominal pain and diarrhea.