When Does It Occur?

If the lymphatic system fails to work normally, a build-up of fluid (lymph) develops in the affected area, which eventually becomes swollen.  This swelling is known as lymphoedema.

There are two types of lymphoedema: 

Primary and Secondary.

Primary lymphoedema is due to an abnormality of the lymphatic system, which is present from birth.  It often runs in families and is due to an underdeveloped or abnormally functioning lymphatic system.  When the lymphatic system can no longer cope, swelling develops. This can occur in infants, children and adults. 

Secondary lymphoedema can occur following damage to a normal  lymphatic system.  This can be as a result of surgery (e.g. the removal of lymph nodes during surgery for cancer), or as a side effect of radiation treatment for cancer.  It can also occur as a result of Chronic Venous Insufficiency, or after injury, scarring, or infection of the lymphatic system.