Nail Diseases: When to See a Dermatologist vs. a Cosmetologist

Question
Name some of the nail diseases that can be treated by the cosmetologist

Answer
I believe that NONE of the nails diseases can or should be treated by a cosmetologist.
I believe and I impel my clients that have anything suspicious on their nails to visit a dermatologist or a podologist so to get the appropriate treatment for their "problem" if it exists. It is not always a fungus (or anything else) caused by dirty shocks...there might be something more sever than that and a cosmetologist might is not qualified to solve it and the damage could be huge.