Strictures can be caused by inflammation (swelling) or hardened scar tissue which has built up over time. In theory the frequent anuscopes could maybe irritate the lining enough to cause temporary inflammation and swelling. I would ask your surgeon what the cause of the narrowing actually is: inflammation or scar tissue. If it's the former, then it can be treated with meds which reduce inflammation; if the latter, there's no treatment other than surgical removal of the affected part, I am afraid :-/
Dx Crohn's in summer of 2000. (Yay )
Tried and failed: 5-ASAs, azathioprine, 6MP, Remicade, methotrexate, Humira, various diets.
Had surgery Feb '13 - subtotal colectomy with end ileostomy. First thing to put me into remission in 13 years.
Had second surgery 10th July '15 to reverse the stoma and connect the ileum to the rectum. Feeling rough.