White toe nail: The blood vessels under your nail in the nail bed is what gives your nails the pink color. The common cause of white nail is fungus or separation of the nail from the nail bed. Green/yellow discoloration is usually sign of an infection. I suggest you see a Podiatrist to have a fungal and bacterial culture done on the nail sample as well as to evaluate the nail to see if it is separated from bed
Answered 9/22/2014
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