There are very few among us that can boast of never having dark circles under the eyes after a late night. These endure, making you look unhappy and tired. Admittedly, tiredness plays a key role in their appearance, but other factors must also be taken into consideration. Dark circles of vascular origin (poor blood circulation) are mainly due to fatigue, but also to alcohol consumption, smoking or taking certain drugs. Dark circles of pigment origin are often due to hereditary factors, one of the aggravating factors of which is the sun.