Nail fungal infection (onychomycosis)

A fungal infection of the nail (onychomycosis) occurs when fungi infect oneor more of your nails. Onychomycosis usually begins as a white or yellow spot under the tip of your fingernail or toenail. As the fungal infection spreads deeper into your nail, it may cause your nail to discolor, thicken and develop crumbling edges - an unsightly and potentially painful problem.

Nail fungal infections account for about half of all nail disorders. They usually develop on nails continually exposed to warm, moist environments, such as sweaty shoes or shower floors. The infection isn't the same as athlete's foot, which primarily affects the skin of the feet.

Nail fungal infections may be difficult to treat, and they may recur. But medications are available to help clear up a nail fungal infection permanently.

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