This is a very interesting article on the lymph system, detoxification, symptoms of lymphatic congestion & some excellent suggestions written by Dr. John Douillard, DC. He was former co-director of a cancer center at the Deepak Chopra Center. Very well worth reading for more information.
(copy and paste if it does not click straight to article)
Also, here is the video from youtube (Detox, Cleansing & Drainage of Your Lymphatic System – Dr. John Douillard) so you can watch it instead: