###Human: Experiencing involuntary urination after two days of femur bone surgery. Why? ###Assistant: Hi. I have gone through your query and reports (attachment removed to protect patient identity). She has temporary urinary problems which are reasonably common at her age following any major surgery with immobilization. I would like to know whether she passes urine usually and whether she has any burning sensation during urination. It is essential to make sure that whether she has a urinary tract infection or any retention of urine in the bladder. If these are absent, then she will get better soon with time, when she starts to ambulate and when she gets back to her routine activities. In the meantime, she can be managed with diapers or a urinary catheter if the problem is very severe.