When David Edges's wife spotted a faint brown line on his toenail, he didn't think it was anything to worry about. But Kelly, 47, a skin specialist in the beauty industry, was instantly concerned, ...

Thus, "subungual" means "under the nail." White superficial onychomycosis ... Symptoms may include thickening, discoloration (white or yellow), crumbling, lifting, and spreading to the skin ...

Symptoms of a bruised toenail can include sudden pain, bleeding under the nail, discoloration, and pressure under the nail ...

In addition to pain, nail infections tend to cause swelling and redness or discoloration of the finger ... because there are many nerves under and around the nails. Sometimes, a physical injury ...