It’s not hard to understand why, according to most dermatologists, dark under-eye circles are the second most common skin complaint after acne. We’ve all been there – waking up, looking in the mirror, only to be greeted by unsightly blue-toned bags underneath the eyes. But, did you know it’s not just a lack of sleep that can cause these pigmentation problems? There are a range of other causes and as a result, solutions. Have a read and see if any of these causes ring a bell and see how you can help to improve their appearance.