Pain in back. right side under should blade. feels like a spasm and hurts when i take deep breaths?

?pinched nerve: Unless you had a recent injury, a common cause of this fleeting sharp pain aggravated by a deep breath is a pinched intercostal nerve which runs between 2 ribs. Another possibility is inflammation of the lung lining(pleurisy) or early pneumonia. The pinched nerve resolves on its own usually. Avoid straining the rib cage. See your physician if symptoms persist or worsen.

Back scapula pain: How long is this going on ? Fever, malaise? cough? Passing gas?May be gas, may be pleurodynia ( inflammation of lining of lung, likely viral) gallbladder ( worse with eating?) May be muscular, or pneumonia, rarely clot( elevated heart rate???) or lung collapse. Because of the rare entities would f/u/ w/ doc today