I would say about roughly 2 months ago, if not longer, I trimmed all my toenails after a shower, as I normally do about every week, or when they are getting too long. I noticed, that my big toe nail on my left foot, is the only nail that has not grown back. Its very short, and has a yellow tint near the top of the nail. I am not having any pain or discomfort, other than worry why it hasnt grown back. Could the nail be dead, or there be an infection?