Chronic Swelling & Venous Insufficiency Chronic Swelling occurs when an interruption of lymphatic flow results in the accumulation of lymphatic fluid causing abnormal swelling in the arms, legs, or feet. When lymphatic vessels are impaired, missing or when lymph nodes are removed, the remaining lymph pathways become congested or blocked. These fluids (waste products) can build up in the connective tissues and becomes thicker and the affected areas feel heavy. Venous Insufficiency The valves in the veins channel the flow of blood toward the heart. When these valves are damaged or old, the blood leaks and pools in the legs and feet. Symptoms can include swelling of the legs, pain in the extremities, including dull aching, heaviness, cramping and accumulation of blood in the skin.