I have had a chronic cough and congestion for a couple of years. It's a vicious cycle. Apparently, the radiation caused damage to my esophagus muscles, so I have trouble swallowing, and when things get stuck I cough. that in turn aggravates the sinuses, and so it goes. I had the balloon surgery and botox injections which did not help much. I just have to eat smaller bites, eat slowly, and learn how to swallow better with a speech therapist. My is so bad sometimes that it aggravates the vagus nerve. I have actually passed out from it.