Whether it is normal to have pain after a fresh filling needs to be determined on a case-by-case basis and cannot be generalized. In the process of filling, it is necessary to polish the part of the tooth surface that cannot be used effectively, clean the decayed part inside and fill the material. The mechanical stimulation and the irritation of the material cause short-term discomfort to the tooth, which usually returns as normal in a few days. If the pain persists or increases gradually, it may be that the tooth decay is more serious, the filling material is close to the gods or the long-term deep caries, the pulp has been infected and chronic inflammation occurs, so it should be reviewed as soon as possible and further treatment should be carried out if necessary. In addition, the filling material of the filling is too high, which may cause the patient not to have toothache when opening the mouth, but still have pain when biting the tooth, in this case, it is necessary to go to the hospital to grind off the overly high filling material to ensure the normal bite. In conclusion, toothache is more common when a tooth is just filled, and it is necessary to determine whether remedy or further treatment is needed based on the subsequent recovery.