But what exactly is a bruise? Bruising can occur as a result of an injury or a knock; blood vessels underneath the skin break or burst and blood leaks out under the skin. This causes the purplish ...

The agency OK’d an artificial vessel to restore blood flow in patients, even though its own scientists flagged questionable study results and potentially fatal ruptures of the product.

Brain aneurysms are a bulge or ballooning in the weakened area of a blood vessel that can burst and cause dangerous ... drugs ...