What is severe bleeding?
Severe bleeding can come from an artery (arterial bleeding) or from a vein (venous bleeding). In arterial bleeding, the blood pumps or spurts from the wound with each heartbeat. In major venous bleeding, the blood just runs out of the wound at a steady rate. The arterial bleeding is bright red compared to the dark red of venous bleeding. Minor bleeding (from capillaries), however, can also be bright red.
