6 months post hemorrhoid and anal fisure surgery, I developed a round lump on the outside of my rectum. No pain associated with it. It delvelped to about the size of a walnut. I was going to go into see the Dr., however, after a little bright red blood noted after a BM (like when I had hemorrhoids) it rapidly became smaller until it disappeared. Could this be a hemorrhoid? It was not painful at all. I thought it was scar tissue until it got larger. There is now a pocket of loose skin where the lump was. It is very weird. I will ask the surgeon to look during my next colonoscopy.... but I am really curios. I have had small polyps removed, and must be checked every 2 years. This does not seem like cancer.... a painless cyst?