A small tooth next to the tooth needs to be photographed to check whether it is an erupting permanent tooth, which needs to be extracted, or it may be a supernumerary tooth due to developmental abnormality, which can be considered for observation or appropriate abrasion. 1. Newly erupted permanent teeth: If a small tooth grows next to the tooth during the molar period, it may be a newly erupted permanent tooth, and the embryo is about to erupt as seen in the radiographs, and the corresponding milk tooth above it needs to be extracted. 2. Bicuspid: a small tooth next to the tooth, may be congenital developmental abnormalities caused by bicuspid, small teeth protruding from the neck of the crown, can be observed first, if there are deep joint grooves need to use resin to eliminate deep grooves, if the impact of the aesthetics of the tooth can also be appropriately grinding small protruding teeth. A small tooth next to the tooth, it is recommended to go to the hospital in a timely manner to avoid affecting oral health.