Many reasons explain why people get puffy eyes including a high-salt diet, medical conditions, allergies, genetics, and the natural aging process. Depending on the cause, there are various techniques for decreasing under-eye puffiness. Lower lids that are swollen due to fluid collecting in the undereye area can be temporarily reduced using home and lifestyle therapies. Home and lifestyles remedies include not smoking, getting enough sleep, reducing allergy symptoms and sleeping with your head slightly raised. You can also try cool compresses using a wet a clean washcloth and cool water. Another way is cutting down on fluids before bedtime, reducing salt intake in the diet, and using cosmetics. If you suspect an allergy is causing the swelling under your eyes, consult with your doctor on allergy treatments. In some cases, medical and surgical therapy is required to remove noticeable and permanent under-eye bags.