Nerve injury after tooth extraction can be treated with medication, and some nerve injuries do not require special treatment, as follows. 1. Drug treatment: chin nerve, inferior alveolar nerve and lingual nerve are often caused by instrument slippage or trauma, and the drugs for treatment include those that can reduce edema and decompression, such as dexamethasone and diprazole, etc., as well as those that can nourish the nerves and promote the recovery of the nerves, such as vitamin B12 and so on. 2. No special treatment is needed: the nasopalatine and buccal nerves may be severed when flap is turned, but generally have no effect, and the numbness in the area of their innervation can be improved by the reinnervation of the peripheral nerves. All of the above medications should be used under the guidance of a doctor, and it is recommended to go to the hospital to receive regular treatment.