Poor gastrointestinal absorption belongs to the digestive tract dysfunction, there are many symptoms caused by such diseases, mainly including thin stool, malnutrition, digestive tract reactions, etc. 1, thin stool: because the main function of the gastrointestinal tract is to absorb nutrients, water, help stool shaping, when the gastrointestinal absorption can cause the water and food residues in the stool of patients relatively more, and not shaped, so the stool of such patients is relatively thin, in serious cases, can appear watery stool; 2, malnutrition: prolonged gastrointestinal absorption can cause a decline in the absorption function of patients, resulting in malnutrition, can be manifested as weight loss, dull yellow face, facial appearances. 2, malnutrition: prolonged gastrointestinal malabsorption can cause a decline in the absorption function of patients, resulting in malnutrition, which can be manifested as weight loss, dull yellow face, acne, macular, etc., and in severe cases, anemia and neuritis and other symptoms; 3, gastrointestinal reactions: most patients with gastrointestinal malabsorption, there will be some inflammatory reactions in the intestinal tract, and inflammation can cause irritation to the intestinal wall. intestinal wall, and even cause abnormal spasm of the intestinal wall, causing patients to have a series of digestive symptoms such as abdominal pain, loss of appetite, nausea, vomiting, acid reflux, heartburn and diarrhea. Patients are advised to develop good dietary habits, eat nutritious and easily digestible foods such as eggs and millet porridge in moderation, while avoiding cold, greasy, spicy and other stimulating foods, as well as drinking alcohol, strong tea, coffee and other stimulating beverages, and if necessary, taking appropriate digestive drugs such as multi-enzyme tablets and probiotics such as Gold Diflucan under the guidance of a doctor for treatment. If there is poor gastrointestinal absorption for a long time, patients need to go to the Department of Gastroenterology for further examination through gastroscopy and ultrasound of liver, gallbladder, spleen and pancreas to exclude organic lesions.