Numbness in the lips and jaw eight hours after wisdom tooth extraction may be due to nerve damage or anesthesia effects that have not completely worn off. 1. The effect of anesthesia has not disappeared. Due to the difference in personal constitution, the effect of anesthesia used may be better, or the wisdom teeth extracted by a major surgery, the anesthesia time may be about 6 to 8 hours, you can first observe 24 hours to determine whether the numbness is caused by anesthesia. 2. Nerve damage. Generally after the removal of mandibular wisdom teeth, if the wisdom teeth are close to the inferior alveolar nerve, in the process of removal, there is a possibility that the inferior alveolar nerve will be stimulated, causing numbness in the jaw, but it may also be due to the wisdom teeth themselves inflammation, inflammation encroachment of the inferior alveolar nerve nerve caused by the nerve damage. If you experience numbness after surgery, you can observe for twenty-four hours, and if you are still numb, it is recommended that you go to the hospital to check whether there is any nerve damage.