Breathing problems in polluted atmosphere

[colligon]

I have just joined the forum and so unfamiliar with what to ask or not. I have an undiagnosed breathing problem. I am alright in Britain or in most of the European countries. But when I go to India (my homeland some 40 years ago) I have severe breathing problems, which come up within two to three days. I use face mask or breathing apparatus, but they are not of much use. Last year within six days my condition was so severe that I had to cut short of my stay in Calcutta and urgently fly out. I was in heavy dose of anti-biotics. Within three days in England I was well enough to stop taking anti-biotics. Any suggestion from anyone why it becomes so severe there or is there any remedy?