Possible reasons for not recovering 3 months after wisdom tooth extraction are the residual root left in the extraction wound or the presence of periapical inflammation in the neighboring teeth, etc. The treatment method is to remove the residual root and carry out root canal treatment on the neighboring teeth, as follows. 1. Removal of root stumps: Removing wisdom teeth with broken roots left in the extraction wound may lead to chronic inflammation of the extraction wound, affecting its normal recovery. The root should be removed under local anesthesia, and the alveolar fossa should be scratched and rinsed so that the alveolar fossa can be re-formed into a blood clot and healed. 2. Root canal treatment for neighboring teeth: chronic periapical inflammation of neighboring teeth may cause the wisdom tooth extraction wound to fail to heal properly, and the neighboring teeth should be treated with perfect root canal treatment to eliminate the periapical inflammation. There may be other reasons why the wisdom teeth have not recovered after 3 months, so we suggest that you go to the hospital in time to receive regular treatment as soon as possible.