Filling is the filling treatment for tooth decay, after filling, please pay attention not to eat hard food, not to stimulate the tooth nerve by hot, cold, sour or sweet. If the nerve of the tooth is not exposed, the tooth can be filled directly. The filling material can be glass ionomer, and soft food or liquid food can be eaten 24 hours after filling. If the filling material is resin, it can be hardened directly under ultraviolet light, and you can eat after filling. If the tooth decay reaches the nerve, nerve killing treatment is needed. After the nerve is killed, the tooth becomes a dead pulp tooth and loses the nutritive function of the pulp tissue, the tooth becomes brittle and easy to split. If you eat hard things, it may cause the tooth to split and need to be extracted. If there is temporary inflammation pain after filling, you can take oral anti-inflammatory medicine by yourself. If the pain does not ease after filling or does not go away on its own, it may be inflammation of the nerve of the tooth and root canal treatment of the tooth is needed. If it is biting pain, it may be that the filling material has a high point and proper adjustment of the bite is needed to avoid the formation of occlusal trauma. Therefore, after the filling, usually about two days of soft food, the pain will be relieved by itself, if the discomfort continues to appear, you need to seek medical attention as soon as possible.