Toenail fungus, medically known as onychomycosis, is a common infection that affects the nails, especially toenails. It occurs when fungi invade the nail bed, causing changes in nail color, thickness, and texture. Although all fungal nail infections may look similar to the naked eye, they are not all the same. In fact, doctors classify toenail fungus into different types of toenail fungus, depending on the location of infection, the type of fungus involved, and the way the nail is affected. Understanding these types is essential for proper diagnosis and