Ok..I am a guy..and school will be starting soon..Thus, i will have to study a lot and won't have time to sleep more than a couple of hours a night. If that happens, and I dont slep at least 7 hours, I get terrible black circles..
What concealer type/brand/etc would u recommend for dark circles?
Thank you very much.I really need to buy something before school starts.

Put some pink highlighting pencil on the black circles, and then cover it up with a L'Oreal Mineral Concealer, which you can get at any drugstore. If you can't find a pink highlighting pencil, just use an eyeshadow that is as close to skin-tone as possible, instead. Just make sure you get a good color of concealer to match your skin tone; since you're a guy, people really can't know that you have any makeup on.

The best concealer is Mary Kay, but it's a little expensive. You should also put cool tea bags on your eyes. Not herbal tea bags, they probably won't work. Just lay them on your eyes when you lay down at some point to relax.

For natural remedy. Try putting cold slice cucumbers on each eyes n relax for 30 minutes. It helps tone down the dark circles. Must do regularly to effective results. It works for me n I hope you too.