The phenomenon of pain after filling a tooth, professionally known as post-filling pain, is not uncommon in clinical practice. For this symptom, we should first distinguish what causes the pain, if the filling material applied to fill the tooth, or filling process due to the turbine drill on the pulp has a slight stimulation, then most of this case can be recovered, symptomatic treatment can be, generally through the anti-inflammatory and analgesic treatment, the pain will be gradually relieved, there is no need to further operations for the tooth body again. There is no need to carry out further operations on the tooth. If there is a problem with the judgment of the pulp in the process of filling, the pulp is already infected with pulpitis. If the pulp is already inflamed and is mistakenly treated as deep caries, then the filling material must be removed from the tooth. Then only the filling material will be taken down again, open the pulp, root canal treatment of the pulp of the tooth, and then repair the tooth, at the same time, this type of root canal treatment of the tooth, it is recommended that the clinical application of crown restoration of the crown to protect the tooth, to avoid the tooth without the nourishment of the pulp, and the phenomenon of splintering.