Chronic bronchitis

[petev]

I have had diagnosed bronchitis 3 times in the past year, year and a half. Syptoms usually begin with runny nose, watery eyes, congestion, sinus pressure, and excess flem. This typically supsides and I am left with a scrathcy voice coughing up these almost solid like flem balls. My voice usually gets better after I get one of these out but it doesn't last long. The doctor prescribes me antibiotics of some sort and this usually clears it up. I am concerned why I seem to be getting this more frequently and not sure if there could be some other underlying cause. Any advice would be appreciated.