what's that white part on your fingernail (right next to the skin) what happens if u haf a big white area?

Question

is it bigger if u have lots of calcium?

Answer 1

the white half moon is called the Lunula (part of the nail anatomy).

white spots that appear every so often are due to injury to the nail. these are harmless and will grow out.

http://www.cnn.com/HEALTH/library/WO/00020.html

Answer 2

I heard it's a calcium deficiency.