Dark circles under the eyes are not only the patent of adults, but children can also have dark circles under the eyes if they are not well taken care of. 1, if too much carbon dioxide and metabolic waste accumulates in the veins, the blood darkens and forms stagnation, it will cause pigmentation of the eyes, especially children’s skin is thinner, so it is easier to observe than adults have similar dark circles under the eyes. 2, if the child has two days of nasal congestion, then the possibility of dark circles under the eyes is even greater, this is because after the nose is blocked, the blood vessels in the eyes will become thicker, resulting in poor circulation, the blood in the veins are blocked around the eyes reason. 3, genetic factors can not be ignored, some people also say that the baby anemia will appear dark circles, which is no scientific basis, the appearance of dark circles in children and genetics have a close relationship, if the immediate family members have dark circles, then the chances of children appearing dark circles will also become greater. Therefore, if your child has dark circles under the eyes, but there is no discomfort, you do not need to pay attention to it, it will recover later on its own, but if it does not subside after a long time, it is recommended to consult a doctor as soon as possible.