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The caffeine in tea can help reduce swelling and darkness under the eyes. After you've brewed some tea, remove the bags and squeeze out the excess water. Refrigerate the bags for 10 minutes, and then lay down with the bags over your eyes for at least 15 minutes. Chilling the bags ensures that they're not too hot to place over your eyes. The cold temperature also helps reduce any swelling under the eyes when you use the bags as compresses. Be sure to use caffeinated tea bags.
Use tea bags as eye compresses.