Take a LOT of Fiber

Because if you don't, then the samples the doctor takes from you (let the reader understand) are likely to contain blood. Blood where it doesn't belong alarms doctors. And THEN you're in for it. Then you are going to be told to have a catheterization, cystoscopy, colonoscopy, cytology tests, CAT-scan of your kidneys, and on and on, all from letting yourself become constipated. What a waste of time! What a lot of bother!

P.S.) First two of those tests are already done and all's normal.