There are many factors that can cause black teeth in children, the most common one is tooth decay. Some children have black teeth inside their mouths, and some children will tease them, “Why do you have black teeth? At this time, parents should pay attention to it and bring it to the hospital first to check whether it is all tooth decay. The second possibility is some pigmentation, now clinically encountered many children, oral teeth surface will have a little melanin deposition, this may be caused by a number of factors: 1, may be the child’s mouth inside the existence of melanin-producing bacteria, so if you do not pay attention to oral cleaning, the resulting pigment will be deposited on the surface of the teeth; 2, may be some children take Chinese medicine, did not clean up in time, so The pigment will accumulate on the tooth surface; 3, some children take blood supplements, which will also cause the pigmentation of the tooth surface. The third reason may be the blackening caused by dental trauma, some children at the time of the fall, in fact, there are no symptoms, there is no crying, especially in infancy, after the incisors fell off may be then the affected child cried a little, there is no performance behind; because especially the teeth are more complete situation child symptoms are not obvious, if the teeth have cracked off or less piece, parents may pay more attention, slowly after After a period of time, the teeth become more and more black, this may be due to the nerve necrosis caused by the black. For these three causes of black teeth, parents should first take the child to the hospital and take different treatment measures according to the different causes.