<s>[INST] hi i receantly quite a job that was making me sick had blood in my pool and recently got back my chest exray and i have obstructive pulmonary disease and am going for a castonoghfy when i was working i constantly complained about the gas fumes could this be the cause of my illnesses and how can i test for it doctors keep telling me there are no test [/INST] Thanks for your question on Chat Doctor. Yes, you are right. Chronic inhalation of chemical fumes can lead to chronic obstructive pulmonary disease (COPD). And if you are smoker chances of COPD are more. So gas fumes can cause COPD. The cornerstone of COPD diagnosis is PFT (Pulmonary Function Test). It will not only diagnose COPD, But also tells you about severity of the disease. And treatment of COPD is according to the severity of the disease. So better to consult pulmonologist first and discuss all these, get done PFT and start treatment. </s>