Ingrown toenails can be caused by too-tight shoes, a fungal infection, or improperly cutting your nails.

Scientists at the University of Calgary say they are looking for toenail clippings for a study looking into radon gas ...

A radioactive gas that gets trapped in indoor spaces accounts for 3 to 14 percent of all lung cancers – and our toenails could reveal our long-term exposure to this gas. Radon, a colorless and ...

Radon is a colorless, odorless, radioactive gas that seeps from the ground as uranium decays in rocks and soil. Outdoors, it ...

I spent years hoping-slash-deluding myself into believing that my own ingrown big toenails, caused by years of too-tight ...