Summarize this article in one sentence.
Getting enough sleep can help you avoid pale skin that makes dark circles stand out. Drinking plenty of water and minimizing salt can prevent water retention, which is one factor in puffy morning eyes. . If you have a congested nose or sinuses, your eyes probably appear darker due to swollen blood vessels. Take antihistamines or visit the doctor for other allergy treatments. These "allergy shiners" are more common in children and teens. While this won't make your eyes lighter, it can make dark circles less noticeable. Here are a couple treatments:  Chill a pair of spoons in the freezer. Lie down with the bowls of the spoons over your eyes and let the cold reduce the swelling.  Give yourself a facial massage to encourage lymph drainage. If this helps reduce swelling, you may have poor lymph drainage, which you can address with lifestyle changes. While eyelids do change in appearance as you age, this is a very gradual process. If your eyelids have become much darker or more swollen in the past few months, ask your doctor to examine them. There are many conditions that can cause a change in eyelid appearance.

Summary:
Make small lifestyle changes. Treat allergies Fix puffy eyes. Visit the doctor if this problem appeared suddenly.