A fungal nail infection can affect the fingernails or the toenails. Males and females of all ages can acquire this troublesome condition. The most common risk factors for acquiring a nail fungus include tight or poorly-fitting shoes, prolonged moisture on the hands or feet, and injuries around the nails. People who frequent public swimming pools, shared bathing facilities and similar places where people often go barefoot increase their risk of developing one of these infections. Those whose feet perspire heavily are also at a greater risk.

Changes in the toenail’s or fingernail’s structure or appearance account for the main symptoms of a fungal nail infection.