Use a volcano vaporizer. I've noticed such a difference in terms of my lungs hurting or coughing up nasty shit in the morning. And the high is damn fucking good too!
Also, do you have asthma? Taking too much ventolin can cause your lungs to over-expand.
And (of course) if you smoke cigs, stop. Not that I don't have a cancer stick every once and a while, but I noticed a big difference when I quit 2.5 years ago.
Get better!