Thanks for your question on Health Care Magic.
I can understand your concern.
Since you are smoker, possibility of
bronchitis is more in your case.
Bronchitis can cause similar symptoms like cough,
chest pain,
back pain, expectoration, difficulty in breathing etc.
So better to
consult pulmonologist and get done
1. Clinical examination of respiratory system
2. Chest x ray
3. PFT (Pulmonary Function Test).
Chest x ray is needed to rule other lung diseases.
PFT is must for the diagnosis of bronchitis. It will also tell you about severity of the disease and treatment of bronchitis is based on severity only.
Smoking cessation should be done first.
Inhaled bronchodilators and inhaled corticosteroid (ICS) are mainstay of treatment.
So possibility of chronic bronchitis is more in your case.
Hope I have solved your query. Wish you good health. Thanks.