Your enlarged prostate could certainly be affecting your bowels. A 90 gram prostate is quite large. Insurance companies insist on patients meeting certain criteria which by the time these symptoms are pronounced the bladder is often already damaged by becoming thickened from working harder than it should. Keep a voiding diary (date and time amount [get a calibrated container]) and work with a good sympathetic urologist. You might be surprised to learn how much urine you are retaining. I thought I was emptying my bladder but in fact still had 250 ml or more in my bladder after going.