It is generally not recommended that patients change their own urinary catheters at home, and it is recommended that they visit a hospital and seek professional medical help. For patients who have the need to change the urinary catheter should go to the hospital regularly and change the catheter with the help of a professional doctor, and it is generally not recommended to change the catheter by oneself. It is generally not recommended to change the catheter by yourself, because when you change the catheter by yourself at home, you can not guarantee the sterile operation conditions, and there is a risk of urinary tract infection; and may even be improperly operated, which may damage the urinary tract and further aggravate the condition. To change the catheter, you can go to the urology department, where the doctor will apply an appropriate amount of lubricant on the catheter and insert it gradually under sterile conditions. The patient should follow the doctor’s instructions and visit the hospital regularly to have the catheter changed. Failure to change the catheter for a long period of time may result in urinary tract infections and catheter blockage.