Dark circles are a very complicated thing and we should always try to prevent them first. We must wear sunglasses when we go out. Apply rose water and under eye cream daily. Sleep well and try to sleep early. These are the little things but they matter a lot so we have to take care of it. One of my friends had a really bad dark circle so she started wearing UV protected sunglasses from Wholesale Sun glasses on a daily basis and slept early and applied under eye cream, etc. And that really helped her a lot.