Difficulty breathing

My brother has difficulty breathing, like he is not getting enough air but doctors says he is.  I'm wondering if he has vocal cord dysfunction.  I've read this involves chronic coughing but he does not have this but he has a lot of the other symptoms.  Can you have VCD and not have the chronic cough?  Or is their some other weird type of disease he could have.  Doctors cannot help him.

[Paderla Anitha, DNB]

Hello and hope you are doing well.

Inadequate oxygenation can produce symptoms of breathlessness, as the body tries in an effort to compensate for the decreased oxygen supply. The breathlessness could be due to cardiac or lung disorders. Breathlessness on exertion could be due to the decreased lung function. Again in cardiac disorders the heart is unable to pump the blood adequately, more so when subjected to stress like exercise. Certain systemic disorders like anemia, diabetes, vitamin deficiencies and thyroid disorders can cause these symptoms. So please consult your primary care physician who may ask for an EKG or a treadmill test to rule out a cardiac cause for the symptoms. He may even ask for blood tests and an X ray chest. Lung function tests could further help in evaluation.

Hope this helped and do keep us posted.