A lymphatic drainage massage, also known as manual lymphatic drainage (MLD), is a gentle massage that helps move lymph fluid through the body and relieve swelling. The lymphatic system is a network of lymph vessels and nodes that helps keep fluids balanced and fight infections. When the lymphatic system is disrupted by illness or medical treatment, lymph fluid can build up and cause swelling, known as lymphedema. MLD uses light pressure to stimulate the lymph vessels to contract and move the fluid to areas with working lymph nodes