Step 4: Read and complete the decision guide to learn more about your symptoms.
Shortness of Breath in Adults
You have decided to explore what might cause a person to have shortness of breath with exertion. This is sometimes a symptom of heart failure from fluid backing up in the lungs because of abnormal heart function.
Do you have any of the following symptoms?
shortness of breath or a cough that is worse when lying down
need to prop yourself up with pillows to fall asleep
history of heart disease.