The feeling of urinary embarrassment, unpleasant and painful urination, urgency and inability to urinate, or frequent urge to urinate but not particularly urgent, and the feeling of urination after urination are common in acute urinary retention. Etiology: mechanical obstruction: any obstructive lesion of the bladder neck and urethra. Dynamic obstruction: There is no organic obstructive lesion in the bladder or urethra. Hypokalemia due to various causes etiology: such as aldosteronism, diarrhea, long-term application of diuretics, etc., can cause weakness of the bladder forcing muscles and difficulty in urination or even urinary retention. About 60% of patients after 2 weeks of urethritis onset, gonococcal invasion of the posterior urethra develops urinary embarrassment and frequent urination, up to 10 times a day and night. Check urinary routine, kidney function. Ultrasound of the bladder.