Dry mouth caused by gastric digestion is generally considered to be induced by dietary factors or disease factors. 1. Dietary factors: For example, if the patient often eats some cold and irritating foods, dry mouth, stomach pain and indigestion may also occur. You need to avoid these foods and eat more easily digestible foods. 2. Disease factors: dyspepsia can cause lesions in the digestive tract, resulting in functional dyspepsia, inducing dry mouth, accompanied by abdominal pain, fullness and burning sensation in the upper abdomen. After diagnosis, take medication to promote digestion, such as domperidone tablets and mosapride tablets. Dry mouth caused by gastric digestion can also be caused by other reasons, it is recommended to go to the regular hospital to receive further examination, according to the results of the examination for treatment.