Every time i lift my left arm, my back feels this sharp pinch in the middle left portion. while i am sitting or laying down and change positions, th?

L arm motion/pain: May have tendonitis of trapezius/rhomboids. Have you tried motrin like products if not allergic? Ice 5-10 minutes 3 x a day alternating with moist warmth 5-10 minutes 3 x a day with motrin like products may help. rarely could be lesion but that is very rare or even effects of reflux , though that is usually constant. f/u/ w/ doc