Chest Ache

Been living with emphysema for 10 years. Still working and able to do most things. Steps, inclines and carrying heavy items are a problem but, with only 26% lung capacity, my doctor tells me I do better and more than many people with twice my lung capacity. Use Combivent inhaler but do not need oxygen.

My problem for the past few years is I have occasional episodes of feeling that my chest is being squeezed (an ache not a pain), a constant headache, feeling tired and only slightly worsened breathing. These may last from 4 to 5 days. My pulmonary doctor is at a loss as to why.

Recently had a full A to Z coronary exam and I'm in good shape in that department.

Has anyone experienced these symptoms and/or found a cause and treatment?

Is there any possibility they can be caused by overdosing on the Combivent?

[National Jewish]

I am uncertain about the cause(s) of your symptoms.  Most of them could be caused by a lack of oxygen.  The low oxygen could be due to a temporary decrease in function of one or more parts of your lung.  It