Smoking basically does not cause toothache, toothache may be related to their own oral diseases, such as gingivitis, periodontitis, periapical periodontitis. 1. Gingivitis, clinical gingivitis after the gum tissue is stimulated by inflammation, may lead to gum tissue congestion and edema, smoke stimulation during the smoking process may lead to aggravation of pain symptoms. 2. Periodontitis, patients with periodontitis, periodontal local pressure increases, capillary contraction, may lead to a reduction in the supply of oxygen, affecting the normal metabolism, pain symptoms, smoking may lead to aggravation of the symptoms. 3. apical periodontitis, patients with apical periodontitis may lead to periapical tissue damage, smoking on the teeth and fistula stimulation, so this symptom may occur. Usually must pay attention to oral hygiene, if there is obvious discomfort, it is recommended to actively seek medical examination and treatment.