Stress is the culprit of a wide variety of bodily issues, including pesky dark under-eye circles. If experienced on a chronic basis, stress can affect one’s ability to get sufficient sleep. A lack of needed rest “can make the skin appear more pale and the eyes more sunken, both of which can make dark circles more noticeable,” notes WebMD.
Additionally, when the body is under stress more blood is sent to the vital organs, which can leave the face looking pale—pronouncing the appearance of dark circles. High stress can also damage the capillaries surrounding the eyes, causing them to leak blood. As the blood oxidizes, it will appear dark purple.