Irritable bowel should refer to irritable bowel syndrome, the difference between this disease and functional dyspepsia mainly lies in the etiology, clinical manifestations, treatment methods and prognosis. 1. Etiology: the etiology of both diseases has not been fully clarified. However, it is believed that functional dyspepsia is related to gastrointestinal dyskinesia, increased gastric acid secretion, Helicobacter pylori infection and other factors, while irritable bowel syndrome is caused by genetic factors, dietary intolerance, negative psychological events and other factors. 2. Clinical manifestations: Functional dyspepsia is characterized by postprandial fullness, pain or burning sensation in the upper and middle abdomen, and loss of appetite; while irritable bowel syndrome is characterized by persistent or intermittent episodes of abdominal pain, abdominal distension, and abnormal bowel movements (diarrhea, constipation, or alternating between the two). 3. Treatment: Functional dyspepsia is mainly treated with general therapy and medication, establishing good living and dietary habits, and the main drugs include acid-suppressing drugs (such as omeprazole) and gastrointestinal stimulants (such as mosapride), etc. Irritable bowel syndrome is mainly treated with medication, supplemented by psychological treatment, and the main drugs include pivacidium bromide and Bacillus subtilis, etc. Psychological treatments include hypnotherapy and behavioral therapy. 4. Prognosis: functional dyspepsia has a certain degree of self-healing, but untimely treatment can be gastroesophageal reflux disease, hypoproteinemia and other complications; irritable bowel syndrome can not be self-healing in general, and repeated episodes of the author may have anxiety, depression and other mental disorders. It should be noted that the diagnosis and treatment of the above two diseases must be completed by a doctor, and should not be blindly judged and disposed of on their own, so as to avoid adverse consequences.