Seeing that everyone else has a crescent moon, I can't help worrying.
Can this crescent moon really judge health or not? How many crescent moons are there on your nails to be normal?
Today's "Consultation" will tell you in detail what a crescent moon is and why the change of the crescent moon in a short time is related to thyroid abnormalities.
The crescent moon, also known as the half moon or half moon mark, is a white arc that appears under the fingernails.
The invisible part at the end of the nail is called methyl. Methyl is the basis of making keratin cells, which are continuously supplied to maintain the growth of nails.
The newly produced keratinocytes will push out the previous generation of keratinocytes, and when they reach the nail root, the old keratinocytes will keratinize, gradually die and harden, and the color will change from white to translucent, and finally become transparent and hard nails.
To sum up briefly: the fingernails we see are actually a bunch of dead keratinocytes that have been keratinized, while the crescent moon is keratinocytes that have not been keratinized.
There are only invisible crescent moons, and there are no non-existent crescent moons. Some people are born with backward methyl or slow nail growth, so it is difficult to see new keratinocytes, and naturally they can't see the crescent moon.
Besides, not every finger will have a crescent moon. The new moon often appears on the thumb, but rarely on the little finger.
Of course not. Crescent is a nail without keratinization, not only the color has not changed, but also the hardness is lower.
You can poke the crescent moon with your nails, and then poke your nails. You can obviously feel that the crescent moon is soft.
Of course, compared with crescent moon, hard nails can play a more protective role.
Everyone's crescent moon is constant in size and quantity, so we can't judge health by it.
Hyperthyroidism can accelerate the metabolism of the whole body, and nails are no exception. People who have never had a crescent moon will grow a complete crescent moon, while those who have a crescent moon will grow bigger and bigger.
If it is hypothyroidism, it is just the opposite. Due to the lack of thyroid hormone, the metabolic rate of the body slows down, and the growth rate of nails will also slow down or even stop. The crescent moon on the nail will naturally get smaller and smaller until it disappears.
In addition, in the case of malnutrition, when the condition is serious, methyl lacks enough nutrition to make keratin cells, which will also lead to crescent atrophy or even disappearance.