thanks for writing to HCmagic.
The pain in your shoulder blade towards the mid-line, mainly on the back part, is usually a referred pain
of pericarditis. but if it will really persist after 14 days of colchicine
) is doubtful. if it is really a referred pain i am afraid local application of gel will not help in it.
I would advise you to see your doctor to ascertain the cause of pain and proceed accordingly. Pain of acute pericarditis
persisting for 2 weeks on drugs , warrants at least a physician visit and may be more.
feel free to discuss further.