The steps for changing your own urine bag at home include: turning off the switch, then sterilizing the bag with iodophor, and finally changing the drainage bag and checking it. 1. Turn off the switch: Turn off the switch on the catheter first when changing the urine bag, so that no urine will flow outward when changing the catheter. 2. Disinfect with povidone-iodine: Use povidone-iodine solution to disinfect the connection between the urinary catheter and the drainage tube, fix the end of the catheter, and then hold the connection head of the urinary bag and gently pull it outward, pull it out, take out the new urinary bag, remove the protective cap of the connection head of the urinary bag, and insert the connection head into the end of the urinary catheter. 3. Replace the drainage bag and check: drainage bag replacement, check the urine bag drainage urine is normal. If there is no urine after replacement, you can gently press the abdomen to see whether there is urine in the drainage tube. If urine is visible, the replacement has been successful. However, if there is no urine drainage after the replacement, it is recommended to remove it and reinsert it or go to the hospital for examination to see if there is any other abnormality.