Dark circles under the eyes can be an embarrassing problem for many people. They are often caused by a lack of sleep, stress, illness, dehydration or genetics. In some cases, they can even be a sign of an underlying medical condition. Fortunately, there are ways to reduce the appearance of dark circles and improve your skin health. With the right skincare routine and lifestyle habits, you can help reduce the visibility of dark circles and keep your skin looking healthy and radiant.