The tooth is green with special pain needs to be treated according to its cause, such as dental caries, pulpitis, apical periodontitis, etc., after a clear diagnosis, choose the general treatment, filling treatment, root canal treatment. 1. Dental caries: dental caries due to bacterial infection and other factors leading to the chronic destruction of dental hard tissues, can cause teeth green, caries damage deeper will have special pain phenomenon, if not caused by pulpitis, the treatment needs to remove the decayed tissues, choose the appropriate material for filling. 2. Pulpitis: further development of dental caries, trauma and other factors lead to inflammation of the dental pulp, which can lead to the tooth is particularly painful. Treatment requires root canal therapy. 3. Periapical periodontitis: refers to the inflammatory disease that occurs in the tissues around the root tip of the tooth, most of which develops from endodontics, and can be manifested as a blue tooth with special pain, which needs to be treated with root canal surgery to improve the symptoms. There are many reasons why the tooth is green and particularly painful, after the symptoms suggest that the hospital in a timely manner to improve the examination, under the guidance of the doctor to take standardized treatment, do not ignore the symptoms, take it lightly.