Bitter mouth, dry mouth, bad breath, nausea, flatulence and irregular bowel movements may be caused by gastrointestinal diseases or liver and gallbladder diseases, etc. The main treatment is to change lifestyle habits and medication as prescribed by the doctor. 1. Gastrointestinal diseases such as dyspepsia, gastritis, duodenal ulcer and other diseases are prone to the formation of bitter mouth, dry mouth, bad breath, nausea, stomach bloating and unformed stools. Amoxicillin capsules, Bifidobacterium bifidum tablets, omeprazole enteric-coated capsules and other drugs can be used as prescribed by the doctor in order to improve the gastrointestinal environment, regulate gastrointestinal function and improve the symptoms. 2. Hepatobiliary diseases such as hepatitis, cholecystitis, cirrhosis and other diseases, can affect the bile secretion, utilization, which in turn affects the digestion and absorption of food in the gastrointestinal, food is not excreted in a timely manner and dry mouth, halitosis, gastric distension, bowel movements and other symptoms. Oral medications such as bicyclic alcohol tablets and ursodeoxycholic acid tablets can be taken as prescribed by the doctor to protect the liver and improve the uncomfortable symptoms. Organic diseases such as peptic ulcer, tumor, liver and gallbladder diseases need to be excluded and treated according to the cause of the disease and symptomatic treatment, and some patients may have emotional problems, which need to be treated in time. People with the above symptoms should take a light and easy-to-digest diet in their normal life, and ensure regular meals, etc. In addition, if you have any related symptoms, you should go to the doctor for examination in time, so as to avoid delaying your condition.