Medical Definition of Ringworm of the nails
Ringworm of the nails: The most common fungus infection of the nails, also called onychomycosis.
Onychomycosis makes the nails look white and opaque, thickened, and brittle. Those at increased risk for developing onychomycosis include:
Artificial nails increase the risk for onychomycosis because, when an artificial nail is applied, the nail surface is usually abraded with an emery board damaging it, emery boards can carry infection, and water can collect under the artificial nail creating a moist, warm environment favorable for fungal growth.
Alternative names for ringworm of the nails include tinea unguium and dermatophytic onychomycosis.
Last Editorial Review: 7/1/2016
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