Few crescents on the nail cap is not necessarily a sign of poor health. The crescent of the nail cap is also known as the nail half-moon, commonly known as the crescent, less crescent may represent a small area or reduced number of crescent. There is no scientific basis to suggest that a small number of lunulae on the nail is a sign of ill health, so you cannot judge your health by the number of lunulae on the nail alone. If you want to know your health status accurately, it is recommended to go to the medical examination department of a professional hospital for relevant examinations. The relationship between the number of crescent teeth and the body is generally as follows: a. Physiological reasons: generally unrelated to the physical condition. 1. Methyl position: the number of crescent teeth generally depends on the location of the methyl group. The more the methyl position is down, the more the obscured lunula will be, and the less the lunula visible to the naked eye will be, or even invisible; 2. Metabolic ability: The main component of the lunula is keratin, and the growth of keratin depends on the methyl plasmocytes, and the speed of human metabolism will affect the amount of methyl plasmocytes. So each person’s metabolic rate is different, the visible area of the lunula will also be different; 3, age growth: with age growth, the lunula will also gradually become smaller and less, may be related to the aging of the cells of the elderly, metabolic rate is reduced. 2. Pathological reasons: It may be related to poor health. Body abnormalities lead to changes in the body’s metabolism, cell growth, the moon will also change. 1, malnutrition: single diet structure, inadequate intake, malnutrition of the methytoplasmic cells, will also make the moon gradually become smaller, less, and in serious cases will be accompanied by anemia, moon color pale performance; 2, thyroid abnormalities: hypothyroid patients have a relatively slow metabolic rate, so the moon will also 3, tumor: tumor is a consumptive disease, may lead to malabsorption of nutrients in the body, which can appear less nail crescent; 4, other: chronic gastrointestinal diseases, liver disease, etc. may lead to nail crescent reduction. In addition, the normal color of the crescent is milky white, if there are changes in color, such as green, purple, red, may be related to poor blood flow, fatigue, excessive physical exertion, and even respiratory system, heart failure, trauma and other diseases, should draw attention to, and promptly seek medical attention, diagnosis and treatment.