<s>[INST] Dear Doctor. I had been a tabacco chewer for the last 10 years or so. For the last one and half year, I have quit any form of tabacco use. Still, I feel constricting chest pain very often. I also have frequent attacks of bronchitis. Can you please tell why my situation is not improving even after quitting Tabacco? Thanks. Sambar. [/INST] Respected user, thanks for using Chat Doctor.come have evaluated your query thoroughly.* Cause of bronchitis decided the management plan* Your case require evaluation clinically with x-ray, diagnostic bronchoscopy, pulmonary function test * Quitting tobacco protects you from further damage from it, but what about the old insult carried out to bronchi or alveoli, that has to be recovered Hope this clears your queryThanks for keeping trust in our medical services Regards. </s>