Too much smoking causes toothache, including tooth sensitivity, dental caries, periodontitis and so on. 1. Tooth sensitivity: If the teeth themselves are sensitive, the high temperature of the smoke in the mouth when smoking will stimulate the teeth and cause toothache. 2. Dental caries: tobacco can accelerate the formation of plaque on the surface of the teeth, so smokers are more likely to have dental caries. Once caries occurs, it is easier to cause toothache. 3. Periodontitis: smokers are prone to periodontitis, swollen gums, gum recession and other manifestations of gum recession at the surface of the teeth will be more sensitive, causing pain. Smoking not only harms dental health, but also causes a variety of malignant diseases, so you should quit smoking as soon as possible. If there are dental abnormalities, go to the hospital in time for examination.