Persistent dry cough
Shortness of breath, especially during exercise
Wheezing
Chest tightness
Fatigue
Frequent respiratory infections
Symptoms that do not improve with typical asthma treatment
Symptoms that worsen over time
History of exposure to flavoring chemicals, fumes, or certain industrial dusts
Reduced lung function on breathing tests
Abnormal findings on chest imaging
See a healthcare professional for proper testing and diagnosis