I am online and happy to help you with your question today.
There are a number of issues, especially given your husbands clinical history, that could be causing the pain he is having.
He might have a blood clot to his lung
, pancreatitis, gall bladder disease, torn intracostal muscle or rib problem,intestinal diseases and, yes, even constipation.
Since he has seen his doctor while having these symptoms I would expect that most of the above issues were thought of and ruled out.
That being said since he is still having pain, perhaps it is time for another opinion. At this point I feel a consultation with a gastroenterologist would be useful.
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