question: Hello Doctor   I've had a very bad cough on and off for as long as I can remember sometimes I have cough attacts so bad that my throught gets swollen and I cant talk  I'm not a smoker never smoked in my life I'm now 50 years old and cant stand the coughing anymore the doctors cant find out what is wrong with me I even stayed in a hospital for three days so they can do tests on me and during the stay at the hospital of course I never coughed I noticed that air conditioning building or drinking coffee has an affect on me