What does the half moon shapes on the fingers mean?


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That's the "lunula." It's the crescent shaped whitish area of the nail bed of a fingernail or toenail.

To be specific it is located at the end of the nail that is closest to the skin of the finger but still lies under the nail. It is not actually white but only appears so when seen through the nail.

The actual size of the lunula does not correlate with disease or health. The lunula may disappear in the presence of poor nutrition with protein deficiency and with chronic diseases, such as liver cirrhosis, heart failure, diabetes, tuberculosis, rheumatoid arthritis, and multiple sclerosis.
They're areas where your fingernail is still growing--if you press down on them (gently) with a pencil point you'll see they're more tender than the rest of your fingernail, which has toughened.


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