causes for under eye circles
How and why your body creates dark under-eye circles. Learn about the causes of dark circles under eyes. Most people think that dark under-eye circles are caused by staying up late watching monster movies, or having that last drink the night before, or sitting up with your laptop trying to finish the quarterly report.
Any condition that causes the eyes to itch can contribute to darker circles due to rubbing or scratching the skin around them. Hay fever sufferers in particular will notice under-eye smudges during the height of the allergy season. Some food allergies can also cause the area under the eyes to appear darker.