The stomach and intestines are the most important organs for digestion in the human body, and almost all of the nutrients that the body needs need to pass through the intestines. The small intestine includes the duodenum, jejunum and ileum, while the large intestine includes the cecum, colon and rectum. When the food in the stomach after emptying into the small intestine, the small intestine is the longest section of the digestive tube, but also digestion and absorption of nutrients is an important place, and has the function of endocrine, the total length of up to 4 ~ 9 meters. After passing through the jejunum and ileum, food reaches the cecum, which is the transition zone from nutrients to wastes, and food is gradually transformed into feces in the colon and finally discharged through the rectum. Gastrointestinal discomfort symptoms, you need to go to the hospital as soon as possible, by the doctor according to the specific conditions, to develop an individualized diagnosis and treatment plan, so as not to delay the condition.