Dark circles under the eyes are not necessarily a harbinger of cancer, but may also be caused by staying up late, not removing makeup thoroughly, or other diseases. 1. Cancer: It is a kind of consumptive disease. Due to the long-term illness, the patient’s body tends to be poorer and the skin metabolism will be poorer, which may lead to dark circles under the eyes. 2. Staying up late: If you stay up late, it will affect the blood circulation around your eyes, which will lead to dark circles especially after excessive eye use. 3. Incomplete makeup removal: some girls usually like to wear eye makeup, if the long-term makeup removal is not complete, it will lead to local pigmentation, thus causing dark circles under the eyes. 4. Other diseases: mostly seen in some consumptive diseases, such as tuberculosis, cirrhosis of the liver, etc., will affect the skin metabolism, resulting in dark circles under the eyes. Dark circles under the eyes must pay attention to rest, and appropriate local hot compresses and massage, if the symptoms continue to be unrelieved, should go to the hospital in a timely manner to identify the cause of treatment.