In this video, a board-certified dermatologist explains the causes of thickened, yellow, crusty nails due to toenail fungus and outlines various treatment options. The video covers both at-home ...

Take a quick look at your toenails. If they're thick, yellowed or flaky, you might be among the 50 percent of Americans who have toenail fungus but don't realize it. A fungal nail infection is caused ...