Dark circles under the eyes are defined as visible dark pigmentation around the skin of the upper and lower eyelids of both eyes due to various reasons. There are many causes of dark circles under the eyes, and there are three common types of dark circles. First, pigmented dark circles are generally considered to be caused by excessive exposure to ultraviolet light, inflammation or damage to the skin around the eyes, resulting in a slowing down of melanin metabolism around the eyes and a buildup of melanin in the skin. Secondly, vascular type of dark circles, generally seen in fair-skinned patients, may also have a certain relationship with genetic factors, and after staying up late, it is easy to cause poor circulation around the eyes, resulting in lower blood oxygen, resulting in dark circles. The other is the puffy-eye furrow type of dark circles, which is caused by the age factor or after staying up late a lot, resulting in the sagging of the skin around the eyes and the prominence of the puffy eyes, and a local shadow that forms the appearance of dark circles. Therefore, how to treat dark circles under the eyes requires different treatment methods depending on the type. But usually you must develop good living habits and try not to stay up late. You can do hot compresses on your eyelids, as well as acupressure, which can promote blood circulation around the eyes and also relieve the symptoms of dark circles. Severe dark circles also need to go to the hospital for formal treatment, which may require laser or surgical treatment.