The medical term for a bruise is a contusion. Vary rarely, a large bruise can cause bleeding that is difficult to stop. A small contusion on a persons arm or knee, however, is unlikely to be serious.

It’s the word of the decade. “A major signifier of our age.” “The invisible force that shapes our lives.” But what is “trauma ...

Contusions are a type of hematoma — any collection of blood outside a blood vessel. When you get a contusion, capillaries or blood vessels are injured, and blood leaks into the surrounding area. If ...

Contusions, or bruises, happen when the body is hit hard enough to damage the skin and underlying tissue, like muscle and blood vessels. Contusions typically don’t break the skin. Thigh contusions, ...

Over the past few decades, researchers have developed effective treatments for post-traumatic stress disorder (PTSD), a psychiatric disorder some people develop after experiencing trauma. These ...