Dear friend, welcome to HCM!
With a gall bladder
problem, such constant pain on deep breathing could be due to a gall bladder pathology or others like early pancreatitis
Especially if it is increasing with deep breathing, dull aching, constant pain, also going to the back, we should look at the pancreas
You will need a good physical exam and labs (like serum lipase
, LFTs) and USG to elucidate the cause.
Is there any nausea
, fever, fast heart rate?
Please be guided by your doctor if there are positive clues.
Take care and please keep me informed of your progress.
I hope to have answered your query satisfactorily.