question: During the night i feel difficulties in breathing and when i breath a sound comes from my chest.I feel some congestion in my lungs and also cough badly.I also feel sneezing and irritation in my nose most of the time here in bangalore.I am from rajasthan ,when i am there i do not see any problem at all.but when i come to Bangalore all the problems start.i came bangalore 4 years before,but previously i naver had breathing difficulties but now it is getting worse.Please provide suggestion to cure this problem.