To find out what causes a nail fungus infection we need to know what a nail fungus infection is. Onychomycosis, or nail fungus, is a fungal infection that affects one or more of the nails. It often begins with the appearance of a white or yellow spot beneath the fingernail or toenail. In time, the fungus spreads deeper into the nail, often causing it to thicken, discolor and become brittle. When left untreated, nail fungus can be both embarrassing and painful. Unfortunately, these infections are notoriously difficult to treat, and reinfection is very common. But you may be asking yourself still, “What causes a nail fungus infection?” [Read more…]