Dental nerve killing is generally no obvious pain, due to the individual response threshold to pain is different, some people will feel the pain is obvious. 1. No obvious pain: kill the nerve is usually carried out under local anesthesia, most people in the removal of dental nerve will not appear obvious pain, usually 1 ~ 2 days the pain will disappear. 2. Pain is obvious: If the tooth inflammation is relatively large or the patient is more sensitive to pain, removing the nerve of the tooth will appear obvious pain, this situation can choose to take oral painkillers, such as ibuprofen extended-release capsules. Teeth to remove the nerve if the pain is severe, oral painkillers can not be relieved, it is best to go to the hospital in a timely manner, under the advice of the doctor to choose the best treatment program, in order to facilitate the recovery of the condition, the use of drugs need to follow the doctor’s instructions.