Could be allergy related. This spring is horrendously bad even for people who normally don't have allergy problems. Puffy eyes are one of my allergy symptoms.
Try putting a cool cloth over your eyes and resting for a while to see if it helps. I like to wet a couple of wash cloths with cool water and lay down in a dark room with them over my eyes - it doesn't always help them LOOK better, but it sure does make them FEEL better!