An extra tooth next to the tooth needs to be examined in the hospital to see if it is a retained baby tooth or an erupted permanent tooth, or it may be a supernumerary tooth, and depending on the situation, it needs to be considered for extraction or orthodontic treatment. 1. Retained milk teeth and newly erupted permanent teeth. An extra tooth next to the tooth needs to be photographed and examined in the oral cavity. During the replacement period, it may be a retained baby tooth or a newly erupted permanent tooth, which needs to be extracted in time, and the subsequent orthodontics should be considered after the complete replacement of the tooth is completed after observation. 2. Multiple teeth. If it is confirmed that the extra tooth next to the tooth is a supernumerary tooth after oral examination and radiography, the supernumerary tooth needs to be extracted in time to prevent the malocclusion of the teeth. It is recommended to go to the hospital for examination and treatment in time to avoid causing oral malocclusion, which will affect the aesthetics and chewing function.