Dark circle under the eyes give you a tired, ill and older look. You can use under eye gels to reduce the intensity of the dark circles, but to completely get rid of them you need to address the cause of it. A balanced diet is essential in order to keep your skin and complexion clear. When you over exert your body and don't rest enough you will develop dark circles. I would suggest drink plenty of water, eat healthy, exercise regularly and get a sound sleep. You can use home remedies like potato or cucumber eye packs, cotton dipped in rose water to reduce dark circles.