There are many reasons that cause patients to be blue at the corner of their eyes, such as traumatic bruising, hyperpigmentation and poor blood circulation around the eyes. 1. Traumatic bruising: the blood vessels in the skin at the corners of the eyes may rupture and bleed due to traumatic injury and collision, resulting in subcutaneous bruising, which leads to the appearance of greenish corners of the eyes. If it is caused by trauma, patients can apply local cold compresses and hot compresses to improve the situation. 2. Pigmentation: due to congenital or acquired causes of pigmentation of the corners of the eyes, patients can also appear in the corners of the eyes of the performance of the blue, this situation can be taken to laser or surgery and other ways of treatment. 3. Poor blood circulation around the eyes: patients can also be due to pressure around the eyes and other reasons, resulting in poor eye circulation and the emergence of the corner of the eye bluish performance, the patient needs to go to the hospital to further improve the examination can only be symptomatic treatment. It is recommended that patients with blue eyes and other discomforts should consult a doctor in time to assess their condition and follow the doctor’s instructions for treatment.