tooth hurts when biting

You had a cavity treated, got your filling, and expected the tooth to feel better. Instead, it still hurts. So, why does your tooth hurt after a filling? Some sensitivity after a filling can be temporary. The tooth may need time to settle after dental work, especially if the cavity was deep. However, persistent, worsening, or severe pain may be a sign that something else is happening inside the tooth. In some cases, the dental pulp may be too damaged to recover. When that happens, root canal treatment may be needed to save the tooth. The key is knowing which