Ok, I've had what I thought was intestinal bleeding for over 2 years, during this time I've had a knot like boil on my left butt cheek about 2" from the anus. The knot has changed sizes form dime size to as round as a softball. About 6 months ago I noticed that when I had the bleeding the knot would shrink. I saw my pcp who said it was a boil, my wife popped it and drained it. Well here's the odd part, it only bleeds when I got to the restroom or pass gass. It bleeds so much that I get lightheaded, but as soon as I'm done using the restroom it stops bleeding. It might leak a little but hardly any. It's not a hemroid or fissure, as I said it's on the butt cheek. Any help would be appreciated. I'm a disabled Veteran and getting in to see my Dr can take months. Thanks in advance.