Why does my tooth still hurt after the cavity has been filled?

Possible reasons for persistent pain after filling a dental cavity include the following: 1. Irritation from filling material: Restorative materials such as resin or glass ionomer may irritate the dental pulp nerve, causing pain. 2. Trauma during procedure or medication effects: The gum tissue may be injured during the filling procedure, or anti-inflammatory medications used may cause temporary discomfort. 3. Infection or inflammation: Poor oral hygiene after the filling can lead to local infection, or pre-existing inflammation may not have been completely resolved. 4. Occlusal issues: If the filling is too high or thick, it may interfere with normal bite and irritate the gums, resulting in pain. 5. Severe tooth decay: In cases of deep caries, a simple filling may fail to completely eliminate inflammation, leading to ongoing pain. If pain persists, it is recommended to seek timely medical evaluation and appropriate treatment.