Thanks for your question on Health Care Magic.
I can understand your boyfriend's situation and problem.
Since he is chronic smoker, possibility of either
bronchitis or
lung infection is high.
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 out lung infection.
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.
He may need antibiotics, antihistamines, inhaled bronchodilators and inhaled corticosteroid (ICS)..
Smoking cessation is must for him.
So consult pulmonologist and discuss all these.
Hope I have solved your query.
Wishing good healthhealth to your boyfriend . Thanks.