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A fungal nail infection occurs when a fungus invades a fingernail or toenail. Causes include:
Symptoms of a fungal nail infection include cracked, yellow, discolored, streaked, thickened, or spotted nails.
Fungal nail infections do not usually get better without treatment. The infection may spread to other parts of the nail and nail bed. Early treatment may lead to a faster cure with less permanent nail damage.
Last Revised: August 15, 2013
Author: Healthwise Staff
Medical Review: William H. Blahd, Jr., MD, FACEP - Emergency Medicine & H. Michael O'Connor, MD - Emergency Medicine
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