I had the BCIR created in October last year; converted from a failed J-pouch. Of course, I also had the proctectomy at the same time, and have had issues similar to yours. I had a lot of ranging pain/pressure in that area, which I felt as though I needed to go to the bathroom (which is impossible down there now). After a few weeks of increasing pressure, a sudden Burst of fluids released. It turns out it was an abscess (perianal). This keeps happening in cycles (every few weeks it will build up again and break through the skin). I had a traditional incision and drainage (which really sucked, as it takes a long time to heal, is painful, and needs a nurse to pack and repack the wound every day). The other option is through an interventional radiologist, who can use CT guided imagery to locate and drain the abscess through a needle (local anesthetic of course). I've had both options, and am now under the care of the colo rectal surgeon to manage any repeat occurrences. Unfortunately, my only relief throuout the day has been Vicodin. I don't like the side effects of it, but it's better than suffering in pain all day.