Funny that you mentioned the fissure. In 1995 when i had two e fillings put in which caused my present condition, two months later i got a fissure too and two cysts on my head. It went away on its own but the cysts on my head came back, even when i had them removed. I found it very painful too going to the bathroom was a nightmare. Please don't take anti depressants even though i did(back then i didnt think it was mercury, i was just unhappy) Just try and eat well..it will go away.