Difficulty breathing and water pouring out from eyes

My brother has had a very difficult time breathing for the past month. He has had this problem for years off and on but now has been the worst.  He has been to a pulmonary doctor who administered all the pulmonary tests and found nothing.  His eyes are real sore and at times a lot of water pours out from them.  It's weird because when the water comes out of his eyes his breathing get a little better temporarily.  Does anyone know what could be causing this?  He does not have asthma, bronchitis, COPD.  Also he has been to a ears, nose, and throat doctor who also found nothing.  Also he has a lot of bloating.

[Paderla Anitha, DNB]

Hello and hope you are doing well.

If there is itchiness and watering, the eye symptoms can be due to an allergen. Allergens include pollen, mold, dust and pet dander. 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.

Hope this helped and do keep us posted.