Curious if anyone has looked into constrictive bronchiolitis or diffuse aspiration bronchiolitis? Reflux and heartburn are different. Many with reflux do not get heartburn nor do they know they’re refluxing. Acid reflux meds do not stop reflux, they just mask issues by stopping heartburn. Food still comes up, microscopically when the LES is weak. Most with reflux have a weakened LES. Over time, it can damage the small airways. PFTs likely don’t pick up on these nuances and pulm docs will tell patients they’re fine, when they may not be. CT scans don’t likely show this either. Small airways are very complex. Not writing to alarm anyone, but if an ongoing issue, talk to your GI about a nissen fundoplication. May not be for you, but might be worth asking your doc. Docs are great at convincing patients they’re crazy or perceiving things. Don’t buy it.