Edema, formerly known as dropsy or hydropsy, is an abnormal accumulation of fluid in the interstitium, which are locations beneath the skin or in one or more cavities of the body. It is clinically shown as swelling
Thorne Research says that the herbal supplement Butcher's Broom has been used for edema. See this page: http://www.thorne.com/altmedrev/.fulltext/6/6/608.pdf
Some say it helps redness as well because it constricts the capillaries (those little veins in the face).