The size of the crescent moon is only related to the position of methyl and the growth rate of nails, so it is really unfounded to infer your physique or what disease you have.
The size and number of crescent moons are only related to the growth rate of human nails.
It is observed that there is a crescent moon on the thumb of ordinary people, because the thumb has high utilization rate, fast wear and tear, fast growth stimulation and short time for nail to become translucent; On the contrary, the little finger has the least movement and the slowest growth rate, so it is generally "old" before the nail epithelium is introduced, and naturally it will not present a white crescent.
Experts suggest that it is not necessary to compare the size and number of crescent moons with others, because everyone has his own metabolic efficiency. As the philosopher said, "There are no two identical leaves in the world".
On the contrary, it should be noted that if the crescent moon suddenly becomes larger from small to large, or vice versa, it may be manifested as metabolic disorder.
Healthy nails, of course, should be smooth, translucent, shiny, tough and not easy to break, revealing a light pink nail bed under the nails. Diseases do lead to changes in nails, such as iron deficiency anemia, and spoon-shaped nails may appear, which is often called "anti-armor"; In patients with heart failure, due to poor blood circulation at the fingertips, nails will be cyanotic. If the blood circulation is slow when clicking, pink nails may appear for half a month. "But no doctor will diagnose a disease just by looking at his nails."