The treatment of opening a vein or applying leeches to draw blood from the patient. Also means the loss of blood caused by damage to the blood vessels

Bleeding is losing blood.

flow of blood from a ruptured blood vessels

Loss of blood. It can be related to anticoagulant therapy in connection with mechanical valves.

Losing blood as a result of rupture or severance of blood vessels.

Bleeding is the loss of blood from the body. Hemorrhage (AE) or Haemorrhage (BE) is the medical term for bleeding. In common usage, a hemorrhage means particularly severe bleeding; although technically it means escape of blood to extravascular space.