Another tooth grows behind the big tooth, if it does not affect the normal life, generally do not need to be extracted; if it has obstructed the other teeth, you need to consider extraction; mainly depends on the position of this tooth relationship. 1. If there is another tooth growing behind the big tooth, if the anatomy of this tooth is relatively normal, does not affect the surrounding neighboring teeth, and does not affect the normal habits and daily life, it generally does not need to be extracted. 2. However, if it seriously affects the bite or obstructs other teeth, it can be selectively extracted. Because the back of the growth is usually wisdom teeth, wisdom teeth may cause wisdom teeth pericoronitis, causing pain, restricted opening and other symptoms, may also have damage to neighboring teeth. It is recommended to go to the dental hospital to take an oral CT to assess whether the tooth needs to be retained, and then follow the doctor’s instructions for standardized treatment.