Bags under eyes, mild swelling, puffiness, and dark circles under the eyes become common as you age. With aging, the tissues around your eyes, including some of the muscles supporting your eyelids, weaken. Normal fat that helps support the eyes can then move to the bottom of the lower eyelids, causing the lids to appear puffy. Fluid also may accumulate in the space below your eyes, adding to the swelling. Fortunately, we at Physimed Medispa can help!