What Causes Swelling In Elbow Along With Muscle Spasms Under The Arm?

Have cervical sploydiosis. Had acdf c6 c7 due to severe cervical stenosis and bulging disk. Still on significant gabapentin dosage trouble with pain from scapula Mostly left elbow and forearm. Swelling in elbow area and sometimes hours of ongoing shocks or muscle spasms under arm. Surgery in November. concerned about nerve damage. Ongoing physio but feel sometimes like need to stop using left arm