Artificial anal fecal bag how long to change one should depend on the specific situation, the normal situation is 2~3 days to change one. Artificial anal fecal bag is used to collect rectum, ileum after anus stoma patients excreta disposable medical bag, its volume is 450ml, each time the bag is full of 1/3 of the capacity of the excreta need to be replaced. The time of replacement of artificial anal fecal bag is mainly determined by the patient’s gastrointestinal peristalsis speed, the amount of excreta, fistula exudate situation and other factors. Normal gastrointestinal peristalsis rate of 2~3 days will produce about 150g-300g of fecal material, at least 1/3 of the capacity of the fecal material, so keep 2~3 days to replace once. When the gastrointestinal peristalsis is too fast, such as diarrhea, it needs to be changed every day until the diarrhea disappears. When the fistula port continues to flow out of the ooze, or even overflow the bag, in order to prevent bacterial infection, it is necessary to change immediately. It is recommended that patients follow the doctor’s instructions for postoperative wound care, problems in a timely manner to the regular hospital to consult a professional doctor, under the guidance of professionals to standardize the replacement of artificial anal fecal bags.