Lymphoedema is swelling caused by a build up of lymph fluid in the body tissues, especially in the layer of fat under the skin.
Normally lymph flows through lymph vessels, but if the lymphatic system is damaged or inadequate it cannot handle the usual amount of lymph, and fluid builds up in the tissues.
Best Practice for the Management of Lymphoedema. International Consensus, 2006
National Breast Ovarian Cancer Centre Australia - Lymphoedema information
National Breast Ovarian Cancer Centre Australia - Understanding Lymphoedema