Thanks for writing in
Clinically from the information you have provided it seems to be a hemorrhoid
But now that you have had band application I doubt it
What is the size of the bubble ?
What is the status after passing stool ? Does it go back in the anal canal
or you have to need to push it back?
Does it bleed ?
Have you ever had a look at it in the mirror so as to describe its appearance?
Do get back with these details and I will try to help you out .....