<s>[INST] I just coughed up a small lima bean sized white mass, along with a miniscule amount of phlegm.  I am a smoker of 28 years. I have Crohn Disease and am 40 lbs overweight.  I suffer from shortness of breath with mild exertion.  Is this likely a simple infection of the lung or should I see a doctor? [/INST] Thanks for your question on Chat Doctor. I can understand your concern. In my opinion, you should definitely consult pulmonologist. Since you are a active smoker, possibility of bronchitis and lung infection is more. So consult pulmonologist and get done clinical examination of respiratory system, chest x-ray and PFT (Pulmonary Function Test). Chest x-ray is needed to rule out lung infection. PFT is must for the diagnosis of bronchitis. You will need anti, inhaled bronchodilators and inhaled corticosteroid (ICS) based on the reports. You should quit smoking as soon as possible because it is not a good habit. Hope I have solved your query. I will be happy to help you further. Wish you good health. Thanks. </s>