Yellow, thick and greasy tongue coating, dry mouth, bad breath, acid reflux, heartburn, unformed stools may be symptoms of gastrointestinal dysfunction, indigestion, gastritis and other diseases. It is recommended that the patient go to the hospital in time, to clarify the cause of the disease, and then follow the doctor’s instructions for treatment. 1. Gastrointestinal dysfunction: mainly manifested as acid reflux, belching, nausea, vomiting, abdominal distension, diarrhea, constipation, bowel discomfort and other symptoms. It can be treated with drugs such as domperidone, omeprazole, magnesium aluminum carbonate, bismuth potassium citrate, etc. according to the symptoms. 2. Dyspepsia: mainly manifested as epigastric discomfort, abdominal distension, belching, early satiety, anorexia, nausea and other symptoms. You can take domperidone, mosapride, itopride and other drugs to promote intestinal peristalsis and absorption. 3. Gastritis: common symptoms include epigastric discomfort, bloating, belching, nausea, loss of appetite and so on. Calcium carbonate, aluminum hydroxide, esomeprazole, omeprazole, lansoprazole and other drugs can be used to relieve symptoms. Yellow, thick and greasy tongue coating, dry mouth, bad breath, acid reflux, heartburn, unformed stools, etc. are usually related to gastrointestinal diseases. Patients are advised to go to the hospital in time to clarify the cause of the disease and treat the cause. All of the above medications should be used under medical supervision.