Dark circles under the eyes are usually caused by bad habits, disease factors and other reasons. 1. Bad habits: staying up late, excessive ultraviolet radiation, the use of poor-quality cosmetics, prolonged use of the eyes and other factors may lead to local melanin deposits or poor blood circulation, resulting in dark circles under the eyes, in daily life should be maintained in a regular routine, to ensure that the sleep time, do a good job of sunscreen skin, the use of cosmetics produced by the regular manufacturers, try to pay attention to the eye health. 2. Disease factors: endocrine diseases such as adrenocortical insufficiency syndrome can cause generalized skin pigmentation, especially in the eyelid area; inflammation in the eye area can also lead to poor blood circulation around the eyes, resulting in dark circles under the eyes, and the original disease should be actively treated. It is recommended that patients with dark circles under the eyes go to the hospital when necessary to clarify the cause and follow the doctor’s instructions for standardized treatment.