I had a massage a couple of months ago and when she was doing my right side it was hurting my shoulder blade area. I just thought it must have been a tight knot or something. Anyway after a few days my shoulder blade was still aching/sore and has gotten worse. My upper right back aches off all day but i can't tell where it's originating from. If i ask my partner to rub in that area i can't feel anything. If i shrug my shoulders or do shoulder rolls all my right shoulder/back area feels sore and tight. No pain in my arm.
That is the problem with this type of injury. My hip used to hurt but turned out,it was my back pinching a nerve .
I keep worrying it's an organ but then i think it wouldn't hurt to shrug/roll my shoulders if it was surely!!
If you can go to an othropedic doctor they can do simple test that give them an idea what is going on and where it is . I went in because my toes were numb and the doctor said , oh that your back . I said really , and turns out her was right .