The examination methods of irritable bowel syndrome are as follows: 1, stool examination: to find out whether there is mucus, white blood cells, red blood cells in the stool; 2, blood routine: anemia, consumptive diseases or bleeding disorders can exist, such as gastrointestinal tract tumors; 3, colon tumor marker examination: such as the IP antigen, including CA 125, CA 199, and other tumor markers; 4, biochemical examination: because of the chronic malnutrition of irritable bowel syndrome Problems such as hypoproteinemia; 5, gastroscopy and enteroscopy: to rule out organic diseases of the digestive tract; 6, imaging tests: abdominal ultrasound, liver, pancreas, gallbladder can lead to diarrhea and abdominal pain, and other symptoms; 7, power testing: anal manometry of the rectum, no abnormalities can be diagnosed as irritable bowel syndrome.