Catheters do not need to be clamped at night to avoid causing overfilling of the bladder. When indwelling catheterization is performed, indicating the presence of urinary difficulty, it is not recommended to clip the catheter at night, because during the night, more urine may be present in the bladder, and if it cannot be discharged, it may lead to overfilling of the bladder, which is likely to induce complications such as urinary tract infections and urinary tract stones. Therefore, during the period of indwelling urinary catheter, it is not recommended to clip it at night, and it is also necessary to pay attention to daily care to avoid excessive pulling on the catheter, and change it regularly, and pay attention to the smoothness of the drainage tube. When some abnormalities are detected, such as the discharge of red urine, accompanied by symptoms such as pain in urination, it may be the presence of infectious factors, and it is recommended to consult a doctor for examination and treatment.