It is quite ordinary to have dark circles under the eyes (black or dark eye circles), but they are usually momentary and can be treated. Causes oF Dark under eye circles Dark Circles under eyes are normally due to a lack of sleep, fatigue, stress, shortage or some disease Dark circles can be due to genetic factors Nasal congestion may cause dark under eye circles Chronic atopic eczema on skin may dark circles Dark circles under eyes may be due to aging which thins the skin around the eyes. Eyelid swelling or eye puffiness can produce shadows creating light dark eye circles.