I start getting problem in breathing (bronchitis of) in some conditions like; 1. If I do some heavy work like running, climbing or similar physical tasks. 2. Some time from specific smell /odour it starts. 3. If sometime I laugh very much then also the problem starts. Once problem in breathing starts it persists whole night. I get incomplete breath/ suffocation and a sound comes from chest like it has got jam in the very place please suggest. It troubles me alot.