I have the same thing happening to my toenails. Being a female you can understand why I don't wear open toed shoes. My Husband is diabetic and asked his foot doctor about it and he said it was not a fungus but it was hereditary. I don't know of anyone in my family that has or had this problem so maybe it skips a generation. The doc did say I could come in and he would show me how to trim them properly which is very difficult at this point. Well whoopdedo for you doc!!! How about telling me how to make them go away. I was to the point of having the nails removed and maybe starting over. Keep me posted if you find anything out. It's very embarrasing.