Lymphedema is a real problem for some people. It isn't the same as fluid retention that many people get. I have a friend who has Lymphedema and not from breast cancer. Women can and do have it in their arm after breast cancer and have a breast removed. I knew of some of them. I would rather have fluid retention (edema), and sometimes I do, rather than Lymphedema. What a struggle my friend has with it.
Edema arises from venous insufficiency which is
Not Lymphedema.
http://www.mayoclinic.com/health/lym...ents-and-drugs
Another site on Lymphedema pumps.
http://www.lymphnotes.com/article.php/id/406/
Another explaining it.
http://en.wikipedia.org/wiki/Lymphedema