Numbness of the lips after wisdom tooth extraction usually takes three months to six months to gradually recover. Numbness of the lips and face after wisdom tooth extraction mostly indicates that the mandibular nerve was damaged to varying degrees during the wisdom tooth extraction process, thus causing facial sensory impairment and resulting in hemifacial numbness. This phenomenon often occurs when the wisdom tooth is an obstructed wisdom tooth or a completely buried wisdom tooth, and the root of the wisdom tooth is very close to the mandibular nerve canal, which may inevitably affect the inferior alveolar nerve in the mandibular nerve canal during the extraction process. Because the nerve heals and grows very slowly, the numbness usually takes about three months to six months to recover gradually. During this period, nerve nourishing drugs can be taken to promote nerve healing, and hyperbaric oxygen therapy can be done, which is also beneficial to nerve recovery.