I was diagnosed with IC (and a secondary case of urethritis, which was treated) last March and have found considerable relief from Elmiron and a radical diet change (the IC diet, with a few exceptions that seemed to not cause problems for me). For the last couple of months, however, I have not always been able to pinpoint the cause of my pain. (Usually it can be traced back to something I have eaten or the need to have a bowel movement, but at other times there has been no apparent cause.) On a few occasions taking phenazopyrid has NOT helped ease the pain, which has also stumped me. What are the possible explanations? What other steps could I take?