I am getting cough if i go to out side the room what is the reason for it and how can i over come from this problem?

Asthma vs. pollution: Hi! Cough with a specific activity is often related to environmental exposure (like pollution, tobacco smoke, nearby animals, other people's cooking), or even caused by a change in temperature of the air inside vs. outside. Sometimes it is a sign of asthma (even without a prior diagnosis). A primary care doctor can order some tests & help arrange evaluation by a pulmonologist (lung specialist).