Generally speaking, stool testing is mainly to check whether patients have gastrointestinal diseases, when there is bleeding, infection and inflammation in the gastrointestinal tract, etc., the preliminary diagnosis can be made through stool testing, and then in-depth treatment can be carried out according to the test results. Usually stool sampling is very simple, the specific steps are as follows: 1, registered by the doctor to issue a checklist, pay the fee to the hospital testing center to get the container; 2, to the bathroom after defecation, with a spoon or a wooden stick to put the stool into the container, generally only need to collect about 5 grams can be, pay attention not to get sewage or urine, so as not to affect the results of the test; 3, stool sampling should pay attention to take the stool has abnormal parts If the patient’s stool has pus and blood, the stool of the pus and blood area should be collected and sent for examination; 4, the collected stool container will be labeled or written with your name and sent for examination. In addition, before doing the routine stool test, generally follow the original diet, do not overeat, and do not take antidiarrheal drugs or laxatives before doing the test, so as not to affect the test results. Avoid eating animal blood and foods rich in chlorophyll 3 days before the fecal occult blood test to avoid affecting the test results.