When lymphatic vessels are injured or obstructed, lymph fluid cannot drain and accumulates in tissues, causing swelling.
Compression bandages or pneumatic stockings can reduce the swelling.

(See also Overview of the Lymphatic System.)
Lymph nodes are tiny, bean-shaped organs that filter lymph fluid. They are located throughout the body, but particular collections are found just under the skin in the neck, under the arms, and in the groin area. Lymph nodes are part of the lymphatic system, which is one of the body