How do we determine what the root cause of what polyps is? I had endoscopic surgery in March 2018 to.remove polyps and it made things worse for me. For the past 18 months I am unable to exercise, my asthma that I had as a child more than 30 years ago has suddenly come back. The coughing is crazy, the routine is get sick go to the doctor get prescribed for antibiotics and prednisone, relief for a while and the cycle continues. I have done an allergy test and have found that I am allergic to dust mites. How do.I prevent polyps from coming back. Not too mention that I have picked up a lot of weight due to my lifestyle change. If I am in an air conditioned room my symptoms get worse. What do I do? Would taking antihistamines continuously prevent polyps or sinus infections? I'm seeing an ENT specialist in a weeks time. Would surgery again be an option? A CT scan 2 weeks ago showed blockage of polyps in my sinuses totally. The first surgery in 2018 included removal of polyps and reduction of turbinates. This is what the current ENT has told me. Any advice would be appreciated.