 [ Symptoms ] what causes shoulder and neck pain im having neck and shoulder pain it comes and go and is steady it does not happen because of movement i have had xrays and told maybe it is shoulder impingement r some form of arthritis it also affects sleeping i hv also been a hair stylist for 20 plus years im so sick of going to the dr and being told different things so could this be serious like lupus r stress r just arthritis [ Disease ] have you had your thyroid checked i was having pain and stiffness right posterior neck and subscapular muscle spasms after taking 25mcgm of synthroid the pain stiffness and spasms went away