Dark circles are caused by frequent staying up late, emotional instability, eye fatigue, aging, slow venous blood flow and insufficient oxygen supply to red blood cells in the eye skin; After dark circles are formed, you can slice potatoes and stick them on your eyes for about 4 to 5 minutes. Or use gauze dipped in tea to rub around the eyes to reduce dark circles. For incurable congenital dark circles, you can go to a beauty salon for treatment.