hello i read your question and understand your concern i would like to ask that * can you able to move your arm above your head? * is there any felling of tingling/numbness along with the same pain? * any h/o shoulder joint dislocation? *any h/o trauma? * your age? * any other joint involvement ? i would suggest to go for one x-ray of the affected joint AP/LAT take anti inflammatory and analgesics along with muscle relaxant and consult your doctor/ rhumatologist for blood tests good luck and tc