If you don't have a good sleep for a long time, it is easy for you to get the dark circles under the eyes. The dark circles under the eyes may be caused by the not good blood circulation, staying up late at night, smoking and other bad living habits. However, the aloe vera may be good for the dark circles under the eyes because the aloe vera can increase the blood circulation and get the toxin out of the body. In addition, the aloe vera can conclude the vitamin, amino acids, mineral treasure and so on which may complete the human body necessary substance. And the use of aloe vera may increase the immune system, and promote the cell regeneration and increase the recovery of the wounded human tissue. Besides this, the aloe vera has great role for the skin protection. It can make the skin convergence, soft the skin, moisture the skin, diminish the inflammation, remove the hardened keratin, improve scar effect, prevent the small wrinkles and so on. In a word, about the dark circles under the eyes, it can make the melanin in the skin become less and less, making the eyes part look bright.