Smoking is bad for everyone, but especially for people who have asthma. Smoking causes coughing and wheezing and makes it hard to breathe — the same problems that happen during an asthma flare-up. So if you add smoke to lungs that are already irritated, you have big-time breathing trouble.
What does weed do to your lungs?
Research shows that smoking marijuana causes chronic bronchitis and marijuana smoke has been shown to injure the cell linings of the large airways, which could explain why smoking marijuana leads to symptoms such as chronic cough, phlegm production, wheeze and acute bronchitis.
Can edibles hurt your heart?
More specifically, according to some new case studies and research, cannabinoids including THC may influence the cardiovascular system itself and could potentially be associated with increased blood pressure, heart rate, and an increased risk of adverse cardiovascular events.