Brianne,
Bags under the eyes are caused by fluid collecting in loose skin or bulging fat deposits. Your body retains more fluid when you eat salty foods and when you’re tired. The area under your skin also tends to accumulate fluid when you sleep face down. Propping your head up on two pillows when sleeping will let gravity drain the eye area.
Bags under the eyes or dark circles are usually a hereditary trait—that is, it runs in families. The bags appear worse in people who suffer from allergies or who smoke.
You also have to be careful with any product that you put on your face or near your eyes. Some people are allergic to black mascara which contains a dye which many people are sensitive to. Other potential fixes include: putting cold compresses over your eyes, getting plenty of sleep, avoiding stress, cutting down on salt and protecting your eyes from the sun. If you smoke, quit! This will not only help your eyes but health as well.
If you notice that you are the only one in the family with "bags", you may want to consult with a doctor to identify other possible causes. You could be referred to an allergist who can help determine what you are allergic to and plan a course of treatment.
One user reported relief from taking calcium and magnesium supplements with vitamin D.
best wishes,
moderator3