Sour teeth have nothing to do with the heart. Sore teeth are mainly caused by defective tooth tissue or periodontal disease and have nothing to do with the heart. Of course, if there is heart disease, it may cause toothache, but it rarely causes tooth acidity. The cause of tooth acidity is mostly due to direct or indirect exposure of dentin, such as severe wear and tear, severe wedge-shaped defects in the neck of the tooth, severe periodontitis resulting in root exposure, these cases will have direct or indirect exposure of dentin in the oral cavity, and after being stimulated by cold, hot or sweet and sour stimuli, there may be obvious tooth acidity. Some patients with coronary heart disease, especially hypertension, diabetes, hyperlipidemia in the elderly, angina attack may have toothache symptoms. If there is acidity in the teeth and cannot be relieved, it is recommended to go to the hospital for examination and treatment in time.