Tooth pain with cool water is a relatively common clinical condition, for which the disease is a special stage of pulpitis in which inflammatory exudation has just begun to occur. The application of cool stimulation at this time can cause the local exudate to shrink significantly, thus providing relief from painful symptoms. These patients often come to the dentistry department with a bottle of ice water to say a few words and then need to take a mouthful of water and spit it out after a while. In this case, it is necessary to carry out pulp drainage treatment for the tooth position as soon as possible, because this symptom cannot be sustained, and as the exudation symptom gradually aggravates, immediately this kind of patients will have the phenomenon that the pain cannot be relieved by containing cold water.