A drainage bag should usually be changed every 3 to 7 days, depending on the type of bag and the patient's needs. It's important to watch for signs of leakage, odour or dis-colouration, which may indicate the need for more frequent changes. Always follow your healthcare provider's specific recommendations for individual care.
The catheter itself needs to be removed and replaced at least every 3 months. This is usually done by a doctor or nurse, although sometimes it may be possible to teach you or your carer to do it.