When nerve killing treatment is done, the medication used to seal the nerve is usually chosen to seal the nerve for about 10 days and the pain lasts for 2-3 days. If there is severe pain, you should go to the dentist for a review, usually greater compression or congestion tends to make the pain worse. In addition to opening with medication or choosing to reseal with medication, the pain is also relieved when a small cotton ball is placed in. In addition, if there is a slight pain, the patient feels uncomfortable can also choose to appropriate oral pain medication, commonly used drugs such as ibuprofen or acetaminophen. It is recommended not to eat with the affected side because the temporary medication used is zinc oxide, which is not hard enough to be used for eating, and can easily cause the tooth to split or produce a feeling of pressure, resulting in pain.