I'm only 17 years old and I have very bad, dark circles underneath my eyes. Like most teenagers, I don't exercise enough and I don't eat as well as I should and I know that these factors can play into these dark circles appearing. However, none of my friends, all who have the same teenage habits I do, have dark circles under their eyes. I'm very self conscious about this issue and no matter how much concealer or make up I use they do not go away! I'm looking for some feedback on products that you all have used and know work well. I am going to be in my sister's wedding at the end of September and would really love to get rid of this annoying problem before then.
One other culprit can be a lack of sleep. Are you getting enough sleep?
The other thing I am wondering is if there is some sort of medical issue underlying your dark circles. Here are some possible causes for undereye circles from The Mayo Clinic. I have seen the under eye circles in my son even in childhood and the cause was allergies and also eczema. If this problem persists you may want to examine what you are eating particularly wheat, gluten, and dairy products.
If you look on the Internet there are many home remedies for treating under eye circles including tea bags on your eyes or slices of cucumber.
Here is a good New York Times article about which concealers and products one can use for the dark circles.
I hope this helps some and good luck at the wedding. I am sure you will be beautiful.