Curled toenails are toenails that curve inward against the natural shape of your nail. They can cause symptoms such as pain, discomfort, and discoloration, among others. Everything from improper ...

As a pincer toenail progresses, the sides of the nail curve inward and may eventually form the shape of a tube. When the nail grows into the skin, it causes pain, redness, and inflammation.

“Fingernails and toenails are very different in size ... I could more easily shape my nails as I clipped them, and it cut down the time I had to file and shape my nails.

New Scientist's popular Last Word series gives readers the opportunity to answer each other's questions about everyday science phenomena, from the shape of scones to the evolutionary history of ...