While the heart continuously pumps blood through the blood vessels, the lymphatic system relies on the movement of smooth muscles to transport fluid through the lymph vessels. Some health conditions can interrupt the normal flow of lymph, causing fluid to build up in a particular area of the body, often in the arms or legs, where it can causing swelling. This condition is called lymphoedema.
People can develop lymphoedema as a result of infections, cancer treatments that involve the removal of lymph nodes, and any condition that damages the lymphatic system.
Lymphatic massage can reduce swelling and improve circulation throughout the lymphatic system.