Colonoscopy Showed Prolapse In Rectum. Put Surgical Rubber Band. Having Pain In Groin And Anus Muscle Is Weak. Why?

Hi. I had a colonoscopy a gastroscopy and a rectal one done 2nd October. They found a I had a prolapse in my rectum. the dr. put a band on it. but since then I find I go to toilet more often and feel that my anus muscle is weak. I also find it hard to get clean. But I am also having trouble with walking. I get a lot of pain down inside of my leg just below my knee. and in the groin. sometimes it is a real effort to walk. I was wondering if the banding had caused this as I have always been fit and healthy. I will have to get back to you as I have no money at the moment to pay. I am sorry I didn t realize.