To get rid of dark under-eye circles, try reducing the salt in your diet and sleeping on your back instead of on your stomach. You can also massage the skin around your eyes with almond oil or use cucumber slices to refresh your eyes.
The sodium in table salt causes water to leech out of your body's tissues and pool in places such as under your eyes. Eating less salt helps make your under-eye circles less noticeable. Put down the salt shaker, and avoid heavily salted processed foods, too.
When you sleep on your stomach or side, gravity causes fluid to collect under your eyes. By sleeping on your back and using an extra pillow to prop your head up, you can wake up with a fresher, bright-eyed look.
Almond oil is high in vitamin E, which may help eliminate your dark eye circles. To harness its benefits, apply a little almond oil to the area around your eyes. Massage your eyelids gently, and leave the oil on overnight. Wash the area around your eyes with cold water the next morning, and repeat this process each night until your under-eye circles have diminished.
Cucumbers are naturally astringent, so they can help pull the fluid out of your under-eye area. Slice a cold cucumber, and sit with slices resting on your closed eyes for about 10 minutes. Repeat this treatment twice per day for a week.