Bitterness in the mouth is usually caused by poor peristaltic function of the gastrointestinal tract, resulting in bile reflux, which is commonly treated as follows: 1. Adjust habits: The normal circulation of bile is through the bile duct into the duodenum and then into the small intestine for digestion. When patients have too much stress in study and work or inflammatory lesions in the gastrointestinal tract leading to poor peristaltic function, it may cause bile reflux and make patients feel bitter in the mouth. Usually you can adjust your living habits, relieve the pressure of life, so that the mood can be effectively relaxed, then the bile reflux situation can be correspondingly alleviated; 2, diet structure: patients can promote digestion and absorption by adjusting the diet structure, usually more intake of vegetables, apples or pears and other fruits, but also moderate intake of animal protein, such as chicken, duck, fish, meat, etc., can promote gastrointestinal peristalsis; 3, drug therapy: patients can take morpholine, aluminum thioglycollate gel, etc. to promote gastrointestinal peristalsis, which can protect the gastrointestinal mucosa and help eliminate the above symptoms.