It could be some underlying problem for something else. Now, I can stand in front of the john for a dribble. I never feel like I get everything out but I have a lot of prostate and colon cancer on my side of the family. I want to know but I don`t want to know. I have signed DNR`s so I am sure reusing treatment would be covered.
If you at least do one thing, have your blood sugar checked. It can make you drink a gallon of water a day and you feel like you are getting rid of 3! I would see a doctor for sure, just to make sure everything is ok.