Always a tooth with recurrent pain proves that there is a problem with this tooth. If it is located in the innermost part of the mouth, it is an obstructed wisdom tooth with recurrent pericoronitis and needs to be extracted as soon as possible after decreasing the inflammation. If the recurrent pain occurs in other normal functioning teeth, it is necessary to go to the hospital as soon as possible for the doctor to make a diagnosis and take an X-ray film if necessary. It is likely that the affected tooth has a more serious caries on the surface, or even bacteria have injured the pulp and caused acute pulpitis, and the pain will disappear completely and will not recur again through perfect root canal treatment. If the recurring attack makes the patient mistakenly believe that it is caused by fire and delays the treatment, eventually there is a possibility that this tooth will become more and more bad, leading to a large area of tooth loss and even the risk of extraction.