If you have been a long-term smoker—of anything, be it cigarettes, a pipe, or marijuana—your lungs are scarred. Tobacco smoke in particular contains carbon monoxide (poison), tar (gums up those little air sacs we need to breathe), and a plethora of additives Big Tobacco has so infamously added to keep smokers smoking (more poison).
Smoking tobacco is one of the leading causes of chronic obstructive pulmonary disease (COPD). Smoking can also cause emphysema and lung cancer. The toxins from cigarettes can cause damaging inflammation in the bronchus, making it difficult to breathe.
New studies have found that some companies use a flavouring in e-cigarettes which comes from a toxic chemical called Diacetyl. This chemical has been linked to constrictive bronchiolitis, a rare and life-threatening form of non-reversible obstructive lung disease in which the bronchioles are compressed and narrowed by scar tissue and/or inflammation.
Above all, no matter what else you do, stop smoking now, don’t use any kind of smoking or tobacco product.