How often the urine bag should be changed depends on the specific situation. If the urine bag is mainly used for the patient’s post-operative drainage, or if the patient’s urine is relatively clear after surgery, it is generally sufficient to change it once every 5-7 days. If the patient’s condition is serious, long-term bed-ridden, and need to keep a catheter for a long time, it is recommended to change the urine bag every day to avoid bacterial growth, leading to urinary tract infection. In addition, if purulent secretions or other substances block the catheter, it is recommended to change the urine bag every day. For patients who need to keep the catheter for a long period of time, in addition to changing the urine bag every day, it is also necessary to pay attention to the timely replacement of the catheter, it is recommended that the catheter be replaced once every 2 weeks or 4 weeks. It is recommended to change the catheter in a professional medical institution to ensure aseptic operation. For long-term indwelling catheter patients, daily life need to pay attention to the following aspects: 1, increase the amount of water: it is recommended that patients wear a urinary catheter to drink more water, drink a lot of water to produce more urine, urine will be on the bladder as well as the catheter to produce a scouring effect, which can reduce the incidence of urinary tract infections; 2, observation of urinary catheter drainage: daily life, the patient and his family members need to pay attention to the urinary bag and catheter at all times. Situation, such as whether the catheter is smooth, whether there is a blockage or flocculent increase, the state of secretions in the urine bag and so on. If there is pus and blood in the urine or increased flocculation, consult the urology department for routine urinalysis to determine if there is a urinary tract infection. If infection occurs, it is recommended to give short-term quinolone drugs for treatment; 3, the care of the urethral orifice: it is recommended that the patient or caregiver, every day, using cotton swabs or gauze dipped in iodophor solution, for the disinfection of the vulva, which can reduce the possibility of bacterial invasion from the urethral orifice along the catheter. For patients who are physically able to do so, showers can be taken at home, but baths are prohibited.