Pressure of the prostate to the urethra may bring other urologic disease such as urethritis or bladder inflammation , vesical calculus or bladder diverticulum etc . all of these pathological changes also arose the hematuria 前列腺增生对尿道的压迫还可以合并泌尿道的其它病变,如尿道膀胱的炎症,膀胱结石膀胱憩室等等,这些病变也可以引起