After the root canal sealing medication, it is particularly painful every night. It may be necessary to remove the temporary sealing medication, take out the nerve, extract the affected tooth, or treat other affected teeth, etc. It is recommended to go to the hospital for timely consultation and treatment. 1. If the root canal sealing medication is too tight, compressing the nerve or causing pain when the pus cannot be drained, the temporary sealing medication can be removed and the canal can be opened for treatment. 2. If there is residual pulp after root canal or there is a missing root canal, the nerve can be taken out under anesthesia, root canal treatment can be done and the medication can be re-sealed. 3. If there is any splitting of the tooth after the root canal, it may be necessary to extract the affected tooth. 4. As there are other affected teeth with symptoms such as pulpitis, it may be necessary to treat the affected teeth in time to relieve the pain.