I recently landed pretty hard on my left shoulder on the street last week sunday. The next day i couldnt really use my arm, things like lifting it up, driving or trying to reach out and touch things hurt alot. The pain is localised at the back of the shoulder along the rotator cuff and any movement would hurt.
During the week that pain got less and less, i had full ROM if I did a arm circle, direct movement of the arm got better and better, now its just if I reach upward it gets a bit sensitive and sleeping on it is a bit uncomfortable.
Im not sure what injury it is, doesnt really feel like anythings outa place, would just resting it be the best thing due to it just being a possible muscle tear or stretch??