Left arm pain like pins and needles may be caused by trauma, frozen shoulder and cervical spondylosis. 1. Trauma: If the left arm area is traumatized, due to local tissue damage, there may be symptoms of pain like pins and needles. 2. Frozen shoulder: The etiology and pathogenesis of frozen shoulder are not completely clear, but it is usually considered to be the result of the joint capsule fibrosis and synovitis, and the main symptoms include pain around the joint and limited movement. 3. Cervical spondylosis: If you suffer from cervical spondylosis, the nerve roots of the nerves of the upper extremities are compressed, and the symptom of pain like pins and needles in the left arm may also occur. The left arm like a pinch like pain need to go to the regular hospital to do the relevant examination, a clear diagnosis, so as to be targeted to solve the problem.