Onychomycosis, or nail fungus, is a medical name for a specific nail disease caused by fungal infections (the toenail fungus).
In this situation, the nail is referred to as a “mycotic nail,” and it is usually severely damaged.
The nails become hard, thicker, yellowish, with corroded edges, and can even be uprooted in severe cases as the fungus grows and spreads (under ideal climatic circumstances).
Nail fungus not only affects the nails but also the skin and underlying tissues around them.