Its really annoying. Sometimes it hurts. Its like a sharp backache and then go away and comes back whenever it pleases. Not sure how to describe it. Its lately there… contained by that one shoulder.
maybe cuz ur straining it too much or ur unused to it if u want u can go to the doc or narrate ur mom first k this has hapened to me also
Have you be exercising it too much. Maybe you pulled a muscle there. Go see a doctor roughly speaking it.