Dry heart and mouth may be related to digestive system diseases, cardiovascular system diseases, respiratory system diseases, and environmental factors. 1. Digestive system diseases: Digestive system related diseases, such as gastroesophageal reflux disease (GERD) refers to the excessive reflux of gastric acid into the esophagus, and the typical clinical symptoms are heartburn, burning sensation behind the chest, and at the same time, there will be acid reflux. 2. Cardiovascular diseases: such as myocardial ischemia, coronary artery disease, some patients may also manifest heartburn, dry mouth, this discomfort may radiate to the interscapular region or jaw. 3. Respiratory diseases: such as pharyngitis and other acute upper respiratory tract infections, may be more patients will have burning, mouth especially dry, always want to drink water. 4. Environmental factors: such as not enough water, some people sleep with their mouths open to breathe. In summary, the symptoms of dry heart and mouth, it is recommended to go to the hospital in time for examination, and then according to the doctor’s instructions for treatment.