About 1/3 of the general population has experienced gastrointestinal discomfort. Gastrointestinal discomfort symptoms, most of which are so-called 'functional gastrointestinal diseases.'. Common gastrointestinal discomfort symptoms, such as belching, acid regurgitation, burning sensation of upper abdomen, dull pain, abdominal distension, etc., are called 'functional gastrointestinal diseases' if they cannot be found to explain the causes of abnormal clinical manifestations through routine examinations, accounting for about 50%~70% of patients in the outpatient department of digestive medicine. There is also a symptom of reflux from the stomach contents to the esophagus, causing damage to the esophageal mucosa or causing the origin of the esophagus, which is called gastroesophageal reflux disease.

　　Although the etiology and pathogenesis can explain the causes of symptoms, it actually belongs to the broad sense of 'gastrointestinal disorders'. The core pathogenesis of such diseases is gastrointestinal motility disorder and gastrointestinal hypersensitivity to adverse stimuli. Therefore, it is also called gastrointestinal motility disorder.

　　The disease has several prominent characteristics: first, the incidence rate is high. Epidemiological studies show that about 1 / 3 of the general population have experienced gastrointestinal discomfort. Functional gastrointestinal diseases account for 50%~70% in the outpatient department of digestive department. Second, the curative effect is not ideal. Because there are many factors leading to or affecting the onset of the disease and the symptoms are diversified, the detailed pathophysiological mechanism leading to the symptoms is not clear, and there is a lack of drugs or methods for radical treatment. The third is repeated attacks, which have a significant impact on the quality of life. It is easy to cause confusion and phobia of patients. Fourth, patients repeatedly went to hospital, which took up a lot of social, economic and health resources.

　　The factors that induce or aggravate functional gastrointestinal disease fall into three categories:

　　First, psychological and spiritual factors. Nervous tension and emotional excitement will lead to increased gastric acid secretion, decreased digestive enzyme secretion and abnormal excretion, which will lead to uncoordinated gastrointestinal movement and dyspepsia. With the change of social economy, environment and interpersonal relationship, people are exposed to more mental stress factors, which is an important reason for the increase of the incidence rate of functional gastrointestinal diseases. The decline in sleep quality (difficulty in falling asleep indicates anxiety; easy waking indicates depression), changes in hobbies (decreased or lost interest, often indicating depression), and multiple systemic symptoms or discomfort in the body often indicate autonomic nervous dysfunction, mostly related to emotional problems.

　　The second factor that affects gastrointestinal function and causes discomfort is diet. Sweet, hot, raw and cold food, coffee and strong tea often cause an increase in gastric acid secretion, causing hunger pain, noise, burning sensation and other symptoms related to gastric acid. Coarse grains, bean products, and foods rich in crude fiber often cause flatulence, colic and other symptoms related to gastrointestinal motility disorders.

　　The third factor that affects gastrointestinal function is the temperature environment. A cold abdomen or body often causes gastrointestinal symptoms.

　　The symptoms of the gastrointestinal tract almost have no characteristics that are specific to the nature of the disease, so it is impossible to determine the nature of the disease from the symptoms alone. Therefore, the experimental treatment of over-the-counter drugs will take a great risk before seeing a doctor. The main pathogenesis of gastrointestinal functional diseases is gastrointestinal motility disorder and gastrointestinal visceral hypersensitivity. In view of these pathogenesis, the role of gastrointestinal pacing in the treatment of functional gastrointestinal diseases has attracted the attention of many scholars. The gastrointestinal motility therapeutic apparatus precisely uses this principle to promote the disordered gastrointestinal electrical activity to produce a following effect through electrical stimulation, so as to restore the normal rhythm, and thus achieve the purpose of treating various functional gastrointestinal diseases. At present, gastrointestinal dynamic therapeutic apparatus has been widely used in the treatment of functional gastrointestinal diseases, and has achieved good results.