Bleeding is the loss of blood from the circulatory system, which can occur due to injury, surgery, or medical conditions. It can happen externally, where blood exits the body through a cut or wound, or internally, where blood leaks into body cavities or tissues. The severity of bleeding can vary, ranging from minor cuts to life-threatening situations. When bleeding occurs, the body initiates a process called hemostasis to stop the blood flow. This involves blood vessels constricting, platelets clumping together, and proteins in the blood forming a clot. If bleeding is excessive or does not stop, medical attention may be necessary to prevent complications.