I am afraid that irritable bowel syndrome has one of the most numerous historical names among diseases: colonic neurosis, colonic coordination disorder, colonic irritability syndrome, colonic spasm, spastic colon, neurocolonic, vagal neurosis, functional abdominal pain, benign abdominal pain, functional colonic disease, mucous colitis, functional diarrhea, neurogenic diarrhea, allergic colitis, etc. Psychogenic intestinal motility disorders, irritable bowel syndrome, phyllo-intestinal disorders in Russian literature also belong to irritable bowel syndrome. There are also so-called hepatic flexure syndrome, splenic flexure syndrome, psychogenic appendicitis, etc., which should also be classified as irritable bowel syndrome. It only reflects the spastic movement disorder of certain limited intestinal segments. All of the above nomenclature has some justification, reflecting the characteristics and nature of the disease from different perspectives, and pointing out that functional motility disorders of the colon are the main manifestations of the disease. For example, hepatic or splenic flexure syndrome, mainly due to the spasm of the hepatic flexure (right flexure) or splenic flexure (left flexure) of the colon causes pain in the right upper abdomen or left upper abdomen; the right lower abdominal pain manifested by psychogenic appendicitis is similar to appendicitis, which is easily misdiagnosed and is also caused by the agitated dyskinesia of the local intestinal segment caused by psychogenic factors. It should be said that these names are a bit like “blind men feeling the elephant”, and the overall concept is not enough. For example, functional intestinal motility disorder is mainly in the colon, but it can also involve the small intestine; the name “xxxx colitis” is also inappropriate when diarrhea and mucus stool are the main symptoms, because although there is persistent diarrhea or mucus stool, and intestinal infection may be the cause, the patient does not have inflammatory changes in the intestinal mucosa, and the stool examination is normal. Irritable bowel syndrome should not be viewed as an isolated colonic disease; it is often accompanied by systemic symptoms such as dizziness, insomnia, anxiety, depression, and hypochondria. According to the characteristics of symptoms, irritable bowel syndrome can be divided into abdominal pain type (the most common), diarrhea type, mucus stool type, abdominal distension type, and mixed type. At present, the name of irritable bowel syndrome is not perfect. It is believed that as the etiology and pathogenesis of the disease are further elucidated, more scientific and accurate names will emerge.