Why do some people have dark circles under their eyes?
It is commonly assumed that dark circles under the eyes are caused by a lack of sleep, and poor quality sleep and insomnia can certainly cause this condition. However, a variety of other conditions can lead to dark circles under the eyes, some of which are related to lifestyle, such as drinking too much coffee or crying. Other causes are genetic or medically based, such as infection, head or facial trauma, or thin skin on the lower eyelids, which makes the underlying blue-colored veins more visible.
