Almost everyone has somehow smashed a fingernail or toenail. Injuries can cause bleeding under the nail, called subungual hematoma. Learn how it's treated.

Both a bane to runners and—in some strange way—a badge of honor, the black toenail, or subungual hematoma, is actually blood collecting underneath your nail. It can occur from acute or chronic ...

A subungual hematoma is a spot of blood under the toenail. Severe hematomas can cause large blood spots and intense, painful pressure. ... A broken pinky toe can cause swelling and pain.

Medically reviewed by David Ozeri, MD You can learn a lot about your health by looking at your hands. How your hands look, feel, and move can offer important clues about your health and indicate ...