What are the white spots that sometimes show on my fingernail?

If it is a recurring thing then its usually a zinc deficiency.

I am a vegetarian and before i sorted my diet out i was getting these white marks on my nails which i was mistakenly putting down to lack of calcium [which is a myth].

this link will show you how zinc plays a role in our diets and sources of zinc so you can add to you're diet.

http://www.vegsoc.org/info/zinc.html

Zinc deficiency can also cause other symptoms so rethinking you're diet would certainly make a difference to you're health in general.

Usually caused by previous injuries to the nail bed but may be caused by zinc deficiency.

ive heard that they are from not getting enough calcium. i could be wrong, but thats what ive always been told cuz my friend always gets them and me too sometimes

lack of calcium

i also heard it was lack of calcium