There are various types of urine collection bags, ranging from changing them daily to changing them weekly to combat reflux. So how often the urine collection bag should be changed is related to the urine collection bag one is using. If the user is a normal urine collection bag, it is recommended to change it once a day, so as to avoid the possibility of retrograde urinary tract infection. If it is an anti-reflux urine collection bag, it is recommended to change it once a week. This type of urine collection bag has an anti-reflux device that will not cause the urine to retrograde into the ureter again. The urine collection bag should be replaced depending on whether or not there is a blockage of the tube. It is recommended that patients with indwelling urinary catheters should drink more water and urinate more often, and the urinary tube of the urine collection bag should be clamped closed and opened regularly so that infection can be prevented.