Sorry Lars. Did they test you for Chrohns of the rectum? They say this is one of the main causes of it. I had this along time ago. The doctors told me that one of the main causes of this is Chrohns or allergy to gluten. I got rid of gluten in my food and took hydrocortizone which i am on right now which is the foam you inject and it went away. I am using the foam for external inflamation down there to heal up wounds from my second surgery. Food for thought. Wish you well.
Bernard