What is the Lymphatic System
The lymph system is a one-way drainage system made up of tiny vessels and lymph nodes. It drains away excess protein and water, which continually escape from the blood. This lymph fluid is filtered in lymph nodes to remove foreign matter (e.g. bacteria) and to start any necessary immune reactions.
When the lymph system is damaged or blocked, protein continues to enter the tissues from the blood in the normal way and build-up occurs in the tissues. The accumulation of protein in the tissues causes excess fluid to enter them and the tissues to swell.
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