I have a similar condition --- until now without an explanation.
My right side from the hip to midway up bulges out about four
inches more than the left. When I try to do a "sit-up", the
muscles on the left tense but not the center and right. [No, I
cannot accomplish this common exercise even once.] The discomfort
is mild. I've had the condition the entire ten months of my TM.
My doctor attributed it to "retained internal water" that would
go away when I became more active. It didn't. It might.
I'm sorry to hear that your condition is painful. Please share
with us your exercise regimen, expecially if it helps.
Alton, who has not yet written his introduction