Just got home from doctors office and have a left trapezius spasm. Taking muscle relaxants. Advised not to have any massage or chiropractics done. Heat not cold should be applied and if it isn't better in a week, go back to doc. Watch for numbness or strength loss. Take tylenol. Rub on prescription anti-inflamatory cream. That's it. I actually haven't felt anything resembling a spasm just lots of pain when I move, so it's kind of a funny name for the injury, but the doctor I saw, asked my regular doctor who was in the other office doing paperwork, and my regular doctor agreed with diagnosis and treatment. Good luck.