Hey Twink, sorry to hear about the UTI problem. They are just so annoying!! I have been having those a lot too -- but I don't have overt symptoms, just pressure, more urination, and some hesitancy. I think it's a side effect of the Tysabri. But I finally went to see a urologist. They did an ultrasound and found nothing. Tested to see if I retained urine and I did a little bit -- so they call it neurogenic bladder. But I had a bad UTI when I did the test so who knows if it was the MS or the infection?? Good luck figuring things out.