The tooth is still painful after filling, which is also a relatively common postoperative complication in clinical practice. There are two general causes of this condition: 1. Minor irritation. Due to the application of turbo drill or certain filling materials during the filling process, a certain physical and chemical stimulation of the adjacent pulp is produced, resulting in a transient inflammatory reaction of the pulp, which will gradually ease over time and there is no need to continue the treatment. 2. A mistake in judgment of the pulp condition. The pulp itself is a symptom of pulpitis, but the physician treats it as a mere tooth decay for filling, then the filling material can only be removed, and then root canal treatment is applied to treat the tooth again.