A  hematoma  is a collection of blood, usually clotted, in an organ, space, or tissue. When found immediately beneath the skin, it will...

There is a complicated process for sealing off holes or ends of blood vessels after a cut or rupture.  By this process, called...

The first response to a cut or ruptured vessels is  contraction (spasm)  of the blood vessel itself. This may considerably reduce the...