Dark circles under the eyes of children may be caused by physiological factors, heredity, nutritional imbalance, allergic rhinitis and other factors. 1. Physiological factors: for example, if a child sleeps too little and uses his eyes too much, he will have dark circles under his eyes. He should rest reasonably, reduce the time he spends with his eyes, and ensure sufficient sleep, so that he can recover on his own. 2. Heredity: If the parents have dark circles under the eyes, the probability of the child having dark circles under the eyes will increase significantly, which belongs to the hereditary factors, and there are no other clinical symptoms, and will not cause adverse effects. 3. Nutritional imbalance: for example, if a child has an unbalanced diet for a long time, resulting in a lack of nutrients in the body, which may cause anemia, the child will have dark circles under the eyes, which may be accompanied by symptoms such as whitening of the lips and mouth and the face, and fatigue. 4. Allergic rhinitis: children themselves are in the allergic body, may induce allergic rhinitis, will make the eyes appear dark circles, may also be accompanied by sneezing, itchy nose, runny nose and other symptoms. Children may also have other causes of dark circles under the eyes, it is recommended to go to the hospital in a timely manner, improve the examination to clarify the cause of the disease, under the guidance of the doctor to give targeted treatment or treatment.