My husband has had a chronic cough for many years.  it is now much worse.  there is a smell along with it.  He can not speak 3 words without coughing.  Definitely affected by talking. His lung capacity is good, his sinuses look good.  Drs do not seem to be able to diagnose the problem.
Hello, If the cardiac condition is ruled out for heart failure, chronic cough can be evaluated with pulmonary function test via different capacity and lung volumes if not done yet. In general, the following can be done for lung better functionality- deep breathing exercises-YOGA- fresh air walking-high protein, vitamin diet-avoidance of primary or secondary smoking-avoidance of alcohol-avoidance of exposure to pollen Hope I have answered your query. Let me know if I can assist you further.