Small teeth growing next to the big teeth may be the result of retained milk teeth during the tooth replacement period, or it may be multiple teeth. Close observation is recommended, and if necessary, treatment can be done by extracting the tooth. 1. Retained milk teeth: If small teeth appear next to the big teeth, if it happens to the children during the period of tooth replacement, it is mainly considered to be related to the retention of milk teeth and the permanent teeth have already grown out. It is recommended to go to the stomatology department of the hospital in time for examination, and if necessary, consider pulling out the milk teeth, so that the new teeth will grow back to their original positions. 2. Multiple teeth: In addition to this, we also need to consider whether it is related to multiple teeth, it is recommended to take X-rays to make a clear diagnosis, to determine that it is caused by multiple teeth, you need to pull out the multiple baby teeth to avoid the impact on the normal teeth. To summarize, when a baby tooth grows next to a big tooth, it is recommended not to deal with it on your own, but to go to the stomatology department of the hospital to get a clear diagnosis and then treatment.