Long-term dark circles under the eyes of men may be a manifestation of kidney deficiency, but there are more reasons for the formation of dark circles under the eyes. Western medicine mostly believes that long-term dark circles under the eyes are related to abnormal metabolism around the eyes, while Chinese medicine believes that long-term dark circles under the eyes are mostly caused by kidney deficiency. When dark circles appear, they are usually considered to be caused by abnormal eye metabolism, poor blood flow, eye inflammation or pigmentation around the eyes. Long-term overuse of the eyes and insufficient rest can lead to the appearance of dark circles under the eyes, and not due to kidney disease. According to Chinese medicine, the kidney is the master of water, and a kidney deficiency will lead to a flood of water, which will manifest itself as dark circles under the eyes. However, kidney deficiency is often accompanied by other symptoms, such as weakness and sleepiness of the waist and knees, insomnia, excessive dreaming and night sweating at night. Therefore, when diagnosing kidney deficiency, the above symptoms should also be combined with the diagnosis, and the dark circles under the eyes alone cannot be clearly diagnosed. When men have long-term dark circles under the eyes, it is recommended to first adjust the daily lifestyle, avoid staying up late and get enough sleep. If little success is achieved, you can go to the dermatology department or Chinese medicine department of the hospital.