Dear Doctors: I run a lot and developed a growth on the knuckle of my second toe. It’s hard, with a sharp point in the middle, and it hurts. I thought it was a callus, but my running coach says it’s a corn. I thought only older people got those. Will it go away on its own?
Dear Reader: A corn is a small, round area of thickened and hardened skin. Those that form on the top of the foot, typically in…
