First, the crescent moon itself is not used to judge the physical condition, and it is only used when there are major changes.
The so-called semi-crescent moon is actually only a non-keratinized nail in the process of nail growth, and it cannot directly judge whether the body is healthy or not. Some people have no nails for half a month, but they are still in good health. We can't force them to say that they have poor immunity just because of a "crescent moon".
Although the crescent moon cannot simply judge the health condition, its changes can reflect the physical condition; According to relevant data, there is something wrong with people's thyroid, which can easily lead to the crescent moon in the nail becoming bigger or smaller. Therefore, when they find that their crescent moon has changed obviously, they must go to the hospital for examination and find the problem as soon as possible.
Second, judging health mainly depends on nail color, not crescent moon.
Chinese medicine does have a method to judge the health of the body through nails, which is called "looking at nails", mainly based on the color of nails rather than crescent; If the nails are ruddy and shiny, it means that this person is in good health. Generally, unhealthy nails will appear dark yellow and dull, and in severe cases, they will appear heavier in color.
Crescent can not be directly used to judge physical condition, but the color of nails can simply judge whether a person is healthy or not. Of course, the best way to judge your health is to have a regular physical examination.