In the process of treating various diseases, urology often has to place catheters in patients, clinically known as retained catheterization, some patients even have to go home with catheters according to the needs of the treatment of their condition, which may bring a lot of inconvenience to patients’ lives, and families are often confused about how to care for the catheter, here I will briefly introduce the care methods: 1, clean the urethral orifice every day, using medical cotton balls dipped in 0.5% iodophor wipe the urethral orifice 1-2 times, the catheter also needs to be wiped from the urethral orifice 3-5 cm, the above items can be purchased in the street pharmacy (the hospital can not be sold, medical insurance restrictions). 2.After going home, the patient can take a shower, not a bath, just disinfect the urethral opening after bathing. 3.Keep the catheter open and drink as much water as possible, no less than 2000ml per day. 4.Use antibiotics appropriately according to the condition to prevent or treat urinary tract infection. 5.Patients with retained catheters sometimes have urethral discomfort, and may also produce frequent urination or lower abdominal pain, or even sometimes urine flowing from around the catheter, which generally does not require special treatment. 6.If the catheter is blocked, you can try to pinch the interface of the catheter or change the urine bag, and if possible, you can use a sterile syringe to pump sterile saline to flush the catheter, but if not, you can rush to the hospital to deal with it, and the nearby community clinics can solve it. 7, drainage bag (urine bag) every 2-3 days to change a, catheter every two weeks to replace.