Sugar, as a food, provides nutrition when consumed in moderation, and there is no authoritative literature stating that sugar can relieve tooth pain. Tooth pain can be caused by pulpitis, dentin hypersensitivity, etc., which can be relieved by root canal treatment and desensitization treatment respectively. 1. Pulpitis: Acute pulpitis is characterized by spontaneous pain, paroxysmal pain, night pain, etc. Chronic pulpitis can be characterized by paroxysmal dull pain, which requires root canal treatment to eliminate pulp inflammation in order to terminate the pain symptoms. 2. Dentin hypersensitivity: mainly manifested as irritation pain, such as brushing, eating hard and tough food, hot, cold, sour and sweet stimuli can cause soreness and pain in the affected teeth, and desensitization treatment is needed, such as using 75% sodium fluoride glycerin or 75% strontium chloride glycerin to rub on the sensitive areas. Medications should be used under medical supervision. There may be other reasons for tooth pain, if the tooth pain is severe, or accompanied by other symptoms, it is recommended to go to the hospital in a timely manner, early targeted treatment.