Nails have a big white spot on the bottom of may nail.?

Also they're breaking off. Is this some kind of deficiency?Nails have a big white spot on the bottom of may nail.?
It's normal to have a half moon shape of white at the base of your nail.





http://en.wikipedia.org/wiki/FingernailNails have a big white spot on the bottom of may nail.?
It means they are damaged and they are still developing underneath or behind your cuticle

bloom-