Toenail fungus often starts with mild nail discoloration or lifting. It’s not usually serious, but the nails may thicken, become brittle, or fall off without treatment. Nail fungus ...

Nail fungus, also called onychomycosis, is one of the most prevalent causes of toenail discoloration. The most common organism to cause toenail fungus is called dermatophyte. However, mold or ...