Much like tobacco smoke, marijuana smoke is made up of a variety of toxic chemicals that can irritate your bronchial passages and lungs. If you’re a regular smoker, you’re more likely to wheeze, cough, and produce phlegm. You’re also at increased risk of bronchitis and lung infections.
Marijuana may aggravate existing respiratory illnesses like asthma and cystic fibrosis. Marijuana smoke contains carcinogens. It has the potential to elevate your risk of developing lung cancer. However, studies on the subject have had mixed results.