Puffy Eyes

The cause of puffy could be a number of factors including fluid retention and lymph build up, poor diet, too many carbonated sodas, not drinking enough water, drinking alcohol, poor circulation in general, improper diet, and genetics. The skin under your eyes is very thin and contains many blood vessels. Consequently, dark circles under your eyes are possibly due to slow blood flow and lymph build up. To prevent puffy eyes you can reduce sodium intake or sleep with your head on an elevated pillow. In the morning you can wash your face with cold water to constrict the blood vessels and reduce swelling or put cold cucumbers on your eyes to restrict blood flow due to astringent properties. You can also use moistened caffeinated teas bags because the caffeine constricts blood flow and reduces swelling.
http://www.pg.com/science/skincare/Skin_tws_11.htm
http://www.lauralewis.com/asklaura_0400a.htm
http://www.skin-care.us/body_care-t-548.html