Hi, Ron
I have a long history of rhinitis (inflammation in the nose) and sinus infections, as well as picking up every bug and cold going. My allergy doctor reckons it's related to problems with the immune system, which would tie in with the autoimmune nature of Crohn's. Maybe it's similar for you? Apparently a lot of sinus problems are caused by swelling that area, either caused by allergies or other means, meaning that bugs and the like can't work their way out of the nose in the normal fashion, which gives them time to do damage and spread.