I'm not sure if this is a question for a neurologist - but I have a question about the Vagus nerve. I have trouble with shortness of breath. I had tuberculosis as a teenager and had an artificial pneumothorax for several years. Never had any recurrence. I am now 73 years old. I never had shortness of breath until about 6 years ago and it came on very suddenly and has never left. Some days it is worse than others. Lung function tests show very slight difference in the inhaled and exhaled volume of air. Otherwise my lungs are apparently normal although I do have some calcification on the side of the lung that was collapsed. I have a hiatal hernia and now I wonder if the vagus nerve is somehow pinched or irritated and is affecting my breathing. The shortness of breath is very noticable on mild exertion but gets worse in the evenings after dinner and affects me more lying down. Sometimes at night I find myself staying awake just to make sure I keep breathing. It's as if I have to make a conscious effort for every breath. I can walk a mile in about 24 minutes on a treadmill three times a week but if I push myself too hard, like dancing, I experience hypoxia and have a really hard time catching my breath.
By the way, I had a complete workup including stress test and echocardiogram last February and my heart is fine.