Soreness of the whole mouth may be caused by the following three reasons: First, heavy wear of the teeth, heavy wear occurs at night in the case of patients with teeth grinding, or patients who like to eat hard things, wear the hardest layer of enamel on the surface of the teeth to wear away, and then exposed to the inside of the more sensitive dentin tubules, at this time there will be a cold, hot and stimulate the pain of the situation. Second, multiple wedge-shaped defects, wedge-shaped defects are located in the neck of the side of the teeth, mainly due to incorrect brushing method caused by excessive force, the need for timely filling treatment, the pain will gradually improve. Third, periodontitis, periodontitis develops to gum recession, the root of the tooth exposed when the root of the tooth sensitivity, the need for conventional desensitization treatment, can solve the problem of soreness.