The location of the bladder is in the pelvis and lower abdomen, and the pain here can be in the following situations: a. Cystitis, urinary tract infection, when it is necessary to check the urine routine, urinary ultrasound, and when the urinalysis indicates that the white blood cell and bacterial counts are significantly elevated, the appropriate medication needs to be given. The most commonly used drugs are quinolones and cephalosporins, and the symptoms will disappear soon after anti-inflammatory treatment. The symptoms of chronic prostatitis and vesiculitis require a urological ultrasound and a related laboratory test of the prostate fluid. The urinary tract stone, need to do the urinary tract ultrasound or CT to clear the diagnosis.