The crescent is the form of the newborn nail before it is fully keratinized into a normal nail. The nail is in the primary stage of the growth process during the metabolic process and has not yet been fully keratinized into a hard and clear nail, which is the crescent below. Since it is a nascent process, the more frequent the wear and the faster the nascent rate, the larger the crescent may be in 10 nails. For example, the thumb nail, which is subject to the most wear and tear in daily life, is constantly being renewed and will have a wider crescent, while the other nails are less worn and grow at a more balanced rate, so the crescent will be smaller. Having a crescent is not a terrible thing, and there is no need to worry that you are suffering from a disease. A crescent on the nail is a nail that is not fully keratinized during the newborn process and is a natural part of the nail growth process. Many people think that a large crescent is a lack of calcium, while the nail in the newborn process, after complete keratinization, the nail becomes transparent, hard, in the newborn is white, can form the performance of the crescent. Many people think that the crescent of other nails is very small, but only the thumb nail crescent becomes larger, because the thumb nail is often worn nail, often after wear and tear gradually new nail in the newborn, the crescent will appear larger. If all 10 nail crescents are growing rapidly, it is important to look for metabolic diseases that make the nails renew too quickly, and other skin diseases that make the nails renew too quickly and make the crescents appear larger. If the crescent suddenly becomes larger or smaller, you need to be alert to metabolic diseases, which are diseases that increase the metabolism of the skin. Some endocrine diseases may make the metabolism faster, which in turn makes the skin more new faster, and the crescent may become larger in the short term. There is no need to worry too much about the nail crescent, just take some calcium tablets, because calcium will promote the normal keratinization of the keratin, so there is no need to be too anxious about the white crescent on the nail.