instruction: hello doctor I have shallow and fast breathing usually bubbling and wheezing at bedtime along with nasal congestion and post nasal drip my mucus is low and clear with a little cough I have these symptoms for the past three months I used mucinex nasal spray salt water spray and benadryl I am a smoker for 30 years I did not get any health problems so far I have no fever but a little pain in chest with heart palpitations
output: hi I can understand your concern by your history and description the possibility of bronchitis is more likely it is commonly seen with smokers it is the inflammation of airways this inflammation causes bronchospasm which intern causes wheezing breathlessness mucus production etc so please let me know how many cigarettes you smoke in a day have you ever undergone a chest ray and put pulmonary function test