If the toothache after filling is temporary, it is usually caused by the stimulation of the tooth nerve by the machinery or material used in the filling process, which is normal and does not require special treatment. If the filling causes discomfort to the bite, or the nerve pain caused by serious decay, it is necessary to consult a doctor for corresponding treatment in time. If the pain is caused by tooth sensitivity after filling, avoid chewing food on the side of the filling on the day of filling, avoid eating too hot, too cold and spicy stimulating food, generally the symptoms can be relieved in 1-2 days; 2, if the pain occurs when chewing food and disappears when not chewing, it may be the occlusal pain caused by the discomfort of filling material, need to go to the hospital again. If the pain is caused by the inflammation of the nerve due to the serious tooth decay, it is usually more intense and the pain has nothing to do with whether to eat or not, and it is easy to aggravate at night. In this case, it is necessary to go to the hospital for examination in time, and if necessary, root canal treatment or other symptomatic endodontic treatment should be carried out in time. Usually, after the filling, routine attention should be paid to avoid chewing food on the side of the filling on the same day, and avoid eating sticky food for 1-2 days to prevent the filling material from falling off. Minor soreness and discomfort within 1 week after the filling is usually normal and most of them can be relieved by themselves.