I have blocked airways in my nose as soon as i lay down...it gradually gets worse until my nose can no longer breathe. I ve never had this issue before in my life, but it started around 3 years ago after I had lung surgery. I am guessing whatever they stuck through my nose to complete the surgery (camera or tubing maybe), it destroyed the passageways to a point where I m fine standing or sitting up, but laying down sideways or flat and it s just awful trying to get a good nights sleep. I finally broke down and bought some nasal spray and it works, but I do not want this as an answer. Is it possible the surgeons did something to cause this?