What are the main causes of shortness of breath? 1. anxiety. anxiety is one of the main causes of shortness of breath in people who don’t have any other health problems. when faced with an anxiety attack, a panic attack, or highly stressful situations, the sufferer may feel short of breath or feel like they are suffocating. but lungs healthy breath short of Shortness of breath on exertion is a sign that your lungs aren’t getting enough oxygen in or not getting enough carbon dioxide out. it can be a warning sign of something serious. causes of. Shortnessof breath is a common symptom that prompts people to make a visit to their doctor. this symptom may come on rapidly or come on so slowly that it's not recognized at first. if you are experiencing shortness of breath, that does not mean you should necessarily be worried about lung cancer or serious conditions such as heart disease. Shortnessof Breath Causes Diagnosis Treatment Coronavirus And Shortness Of Breath What Does It Feel L...