I have stopped getting my nails done for about 3 months now. I have loss of melanin on my finger right around the proximal nail bed and seems to keep spreading. I had it on other fingers as well but it seems to have grown back. It is just on my thumb now and seems to be spreading instead of growing back and now the skin is turning white and the melanin is gone. Please help and tell me what this could be or how to get the melanin to grow back.