Dark circles under the eyes are very serious may be due to long-term late-night physiological phenomena, may also be due to hepatitis, blepharitis and other diseases caused by, should seek medical attention to find out the cause of the disease. 1. Physiological phenomenon: when the lack of sleep, fatigue, eyelids do not get a rest, long-term contraction in a tense state, the part of the blood flow for a long time to increase, caused by the subcutaneous tissue under the eye circle vascular congestion, resulting in the circle of the eye bruises, stagnation of the dark shadow. This is a normal physiological phenomenon, can be relieved after sufficient rest. 2. Pathologic factors: (1) Hepatitis: Hepatitis patients have damage to liver cells, liver metabolism dysfunction, thus affecting the body’s metabolic function, so that melanin can not be metabolized and completely piled up in the eye area, thus appearing in the serious dark circles. (2) Blepharitis: there are more venous blood vessels distributed in the eyelid area, when inflammation occurs in the eyelid, the accumulation of inflammatory secretions may cause obstruction of blood circulation in the eye, resulting in poor blood flow around the eyelid and deepening of blood concentration, resulting in the appearance of vascularized dark circles under the eyes. When the dark circles under the eyes are very serious and cannot be dissipated, it is recommended to consult a doctor in time to clarify the specific cause of the disease and then follow the doctor’s instructions to avoid delaying the condition.