Frequent urination after prostate enlargement surgery is a normal phenomenon, but it is also considered to be related to sphincter muscle injury, and postoperative failure to pay attention to care induced urinary tract infection. For most of the postoperative prostate enlargement patients, the accompanying frequent urination phenomenon is related to the postoperative swelling of local tissues, thus causing irritation to the urethra. If the patient has excessive mental tension or drinks a lot of water after the operation, it can also be manifested as frequent urination. At the same time, when the sphincter muscle is damaged due to improper operation during prostate enlargement surgery, some patients may experience frequent urination, but this is a rare case. In addition to the above, if patients do not pay attention to personal hygiene care after prostate enlargement surgery, induced urinary tract infection, can be manifested as frequent urination, urinary urgency, urinary pain, lumbago, fever, urethral burning sensation, hematuria and so on. Because the degree of urinary tract infection is different, so the patient’s symptoms vary in severity, can not be generalized. It is recommended that people with frequent urination after prostate enlargement surgery should consult a doctor for examination to investigate whether it is caused by the disease. Daily enhancement of personal hygiene care, avoid foreign body friction stimulation.