Chronic Cough

About 4 months ago my husband got a cold.  After recovering he continued coughing.  It seemed to get better with otc cough syrup at night.  He is under severe stress and now coughs alot during the day.  Especially when he is talkiing in an excited state.It is a whistling sounding cough but he barely coughs when sleeping.  What could be causing this?

[Tammy2009]

Sometimes your lungs get hyper reactive after a cold and the cough can last for months after.

However, a cough can also trigger asthma so best to get it checked out.  That is exactly how I started and it got worse and worse until I was waking myself (and everyone else in the house) up 4-6 times a night and was exhausted from coughing so much.  

[wannasing]

I have mild asthma and got bronchitis that lasted 3 months.  I've been recovering for th last 6 months now and am gradually losing the cough.  A cold that goes to your chest can make your lungs hypereactive.  Inhaled corticosteroids might help the cough by reducing inflammation.  He may have asthma.