Bags under eyes — mild swelling or puffiness under the eyes — are 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 into the lower eyelids, causing the lids to appear puffy. Fluid also may accumulate in the space below your eyes, adding to the swelling.
Swelling of the eyelids can be a sign of a more serious, potentially sight-threatening health problem, such as orbital cellulitis, Graves’ disease and ocular herpes. Several factors cause or worsen this effect, including:
The term “puffy eyes” often is interchangeable with “swollen eyes.” Swollen eyes is generally used to describe an immune response to allergy, infection or injury, whereas “puffy eyes” is more likely used to refer to the external physical characteristic of swollen eyes from water retention, lack of sleep or genetic traits like dark circles under the eyes.
Get tested for allergies. If swollen eyelids and other symptoms of allergies are a regular occurrence, get yourself allergy tested. By knowing what you’re allergic to, you can try to avoid specific allergens or, at the very least, minimize your exposure to them.