When your mouth is crooked after a tooth extraction, nerve damage should have occurred. Needle puncture or injection of a solution mixed with alcohol may cause nerve damage, abnormal sensation, nerve pain or numbness. Clinically, most nerve injuries are temporary and reversible lesions, and in mild cases, they can be recovered after a few days and do not require special treatment; in severe cases, nerve injuries are slow to recover, and there are even individual cases that cannot be recovered at all. The nerves that may be damaged during tooth extraction are the chin nerve, lingual nerve, nasopalatine nerve, buccal nerve, and inferior alveolar nerve, all of which are branches of the trigeminal nerve. The lingual nerve is located in the posterior region of the molar, adjacent to the lingual bone plate of the mandible, and is often damaged when cut here. If the nerve has been damaged, the postoperative period can be given to prevent edema and decompression drugs, such as dexamethasone, diprazole, as well as to promote the recovery of the nerve drugs, such as vitamin B1, B6, B12, can also be used in physical therapy, in the conditions of the units or hospitals can be used in the early selection of microsurgical techniques to decompression of the nerve.