A few weeks a go I felt a spot near my anus whilst having a shower, it popped almost as soon as I touched it. I thought nothing of it but later I checked again and I could feel almost a small lump behind it and the spot had started to fill again. Me being me, I continued to check and monitor it and since it popped the first time I tried to remove any fluids that were inside and a couple of times it did give fluids (pus, blood, clear) but I could still feel this sort of "channel" or lump behind it which has gradually got bigger. It isn't painful when I sit down or anything, I had a little bit of blood when I passed a stool the last time but I feel like the lump has increased in size however it feels like I can move it around too... it is all confusing - any ideas?