Take about 3-5ml of stool routine and try to pick out the part containing mucus, pus, blood and abnormal color for laboratory test. When testing stool bulb ratio try to avoid the use of antibiotics and other drugs within 3 days to avoid interference with the test results. Avoid foods such as iron, spinach, and animal blood for 3 days when testing fecal occult blood to avoid interference with the results. Place the stool to be tested in the specimen box airtight to avoid the mixing of urine to interfere with the test results, and send the specimen for testing in a timely manner after retention to prevent bacteria from mixing in the air for too long and misleading the test results. Avoid the use of laxatives or bowel-promoting drugs before the routine stool test to avoid misleading results. Routine stool tests can help detect intestinal dysbiosis, intestinal infections, gastrointestinal bleeding, and determine the type of bacteria in intestinal infections, as well as guide treatment.