Why you use raw make up comestic to apply in your eyes? The skin around the eyes is very subtle and sensitive, the essential oil will form fat granule and put overload to the skin around eyes. The reason of dark circle under your eyes may be congestion of blood capillary around your eyes. Frequently stay up late, emotional instability, eyes fatigue and aging will induce the circulation of blood slowing down, the erythrocyte (red cell)'s oxygen supply reduce, the carbon dioxide and metabolic waste accumulation, the blood around your eyes lack of oxygen, the blood congest and pigmentation of eyes blood will be happen. Enough sleep and relax will far beyond many nursing care for your eyes to recovery. Vitamin C/A/E and carotene will be helpful supplement to your eyes. Eyes massage and mild hot compress will also helpful. However, any essential oil would not be good to apply on your eyes. The tea tree oil's main function is to diminish inflammation and sterilization. If you really want something to use, special eye cream will be recommended. Hope my tips will help you to change your eyes condition.