How to stop sore, itchy chest pain after triple bypass?

Several years ago I had a triple bypass after a heart attack. Unlike most people I suffered considerable chest pain for months afterwards, just under the skin, which I could hardly bear to touch. Even wearing clothes over it was agony. Gradually it wore off, but frequently it recurs, and now it's back,... show more Several years ago I had a triple bypass after a heart attack. Unlike most people I suffered considerable chest pain for months afterwards, just under the skin, which I could hardly bear to touch. Even wearing clothes over it was agony.
Gradually it wore off, but frequently it recurs, and now it's back, fifteen years later.
Has anyone any ideas what causes it? How to cure it? or even just take away some of the sensitivity?
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