Tooth pain when eating hot or cold is clinically common in both endodontitis and deep caries. In the case of pulpitis, the treatment is necessary to carry out root canal therapy. After opening the pulp and extracting the pulp under anesthesia, then expanding the root canal and applying the adhesive tip combined with the paste to carry out systematic root canal treatment, the tooth will no longer have symptoms of pain after the root canal treatment. But for deep caries, deep caries and early pulpitis is not too easy to identify, need to be judged by the method of appeasement, first of all, deep caries caries part of the removal of clean, for the pulp for appeasement, appeasement observation found that the tooth no longer have symptoms of pain or pain gradually alleviate, then simply filling can be. If the pain persists and worsens after pacification, root canal treatment is necessary.