You Should have A Regular Breathing Exercise For At least Half an hour Very Metticulously Can Have Nasal Filter For Outside Works Take Some Jagery In Empty Stomach In Morning It Will Give You Tremendous Help To Take care of the Problem In Addition You can have Neti Saline Nasal Wash WITH lukewarm Sterlised Water

Bengaluru is considered allergy capital of India by us doctor's due to unique combination of pollen, pollution & the fickle weather which tends to be on the cooler side. This makes it a ripe combination for allergies & sinus infections. Now back to your question of keeping your lungs healthy, there is no magic pill..avoid smoking, wear mask in areas with high pollution, get a pulmo consult once a year if you have family history of asthma & don't ignore your common cold, treat it immediately so that it doesn't persist & develop into sinusitis. I would also recommend flu vaccine shot yearly to help you reduce the frequency of common flu attacks