There are many causes of dark circles under the eyes of children, such as congenital factors, lack of sleep, chronic rhinitis, and so on. 1. Congenital factors: children with congenital hyperpigmentation, orbicularis oculi hypertrophy, etc., can lead to the phenomenon of dark circles under the eyes. Some children may also be due to genetic factors. 2. Lack of sleep: children’s lack of sleep can also lead to the phenomenon of dark circles under the eyes, usually temporary, generally have enough sleep will gradually ease. 3. Chronic rhinitis: children with chronic rhinitis may affect local blood circulation, so the phenomenon of dark circles under the eyes may occur. There are many reasons for children’s dark circles under the eyes, it is recommended to go to the hospital in a timely manner to improve the examination, after a clear diagnosis, follow the doctor’s instructions to take standardized treatment, do not ignore the symptoms, take it lightly, so as not to lead to adverse consequences.