There are many potential causes of difficulty breathing, even if your oxygen levels are normal. Some of the most common causes include: Asthma. Chronic obstructive pulmonary disease (COPD) Lung infections, such as pneumonia or bronchitis. Anxiety or panic attacks. Heart problems, such as heart failure or a heart attack.
Dr. Dean Giannone answered. Circumstance: The oxygen saturation, which might be acceptable when sitting in the doctor's office, goes down with activity, so would be lower when climbing stairs or carrying things. So you might get short of breath even though in the doctor's office the oxygen saturation is fine. Have the doctor let you walk around
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