Some patients continue to feel discomfort after a filling, what is wrong? Does it matter? After a dental filling, some people may experience soreness from eating hot or cold items and pain from biting for a short period of time. What should I do when these situations occur? (1) When teeth are sensitive to hot and cold, soreness and pain after filling for a short period of time, there may be several reasons: (1) When grinding teeth, the high-speed turbine can cause some stimulation to the pulp tissue, making the pulp tissue more sensitive to external stimulation. (2) When the silver amalgam is filled, saliva and other liquids enter the cavity, causing the silver amalgam to undergo delayed expansion, which irritates the pulp tissue. (3) Stimulation of filling materials, in deeper cavities, without bedding, or incomplete bedding, makes the rapid conduction of hot and cold to the pulp tissue causing pulp symptoms. If hot and cold sensitivity occurs within a few weeks after filling, do not be nervous, observe for a period of time and do not eat too cold and too hot food and drinks as much as possible to avoid stimulation of the pulp, generally after 1-2 weeks, the above symptoms will gradually ease and disappear. If the above symptoms do not disappear after a few weeks, or if the symptoms worsen in a short period of time and painful symptoms appear, you should go to the dentist for further examination and treatment for the specific situation. 2.Pain after filling (1) Electric shock-like pain occurs when the teeth bite together, which is because the teeth with different materials have different metal fillings relative to the bite. Due to the difference in the potential difference between the two metals, and saliva can play the role of electrolyte, generating a weak electric current, so that the tooth is subjected to electric shock to produce pain. If such pain occurs, go to the dentist and ask the doctor to replace the two fillings with the same material, or replace one of them with a filling material that is a poor conductor. (2) Pain when biting into the opposing tooth is mostly caused by a high filling and early contact with the tooth when biting, resulting in trauma to the periodontal membrane. If the filling is made of silver amalgam, shiny early contact points can be seen on the surface of the restoration. In this case, the pain can be relieved by going to the dentist and grinding out the early contact points.