I am newer to these posts but have read quite a few stories about people having varying degrees of lung issues due to reflux. I developed asthma at age 24. Was told 3 years ago it was from reflux. I also had a cough(severe one) last year for 10 weeks. Was sent to an Internal Medicine Specialist who doubled my PPI's. It was like a miracle. My cough cleared. They first thought I'd developed Whooping Cough. Thankfully not. So yes reflux can play hovok on your lungs.