<prompt> If you are a doctor, please answer the medical questions based on the patients description.what causes electric shock on my lower left arm with muscle tremors? i had skull fracture a year ago but ct scan show normal. i also have chronic neck pain that moves to back of my head. i had the neck pain before the injury. could u please help? email is YYYYYY  <response>: Hi, I had gone through your question and understand your concerns, If I were your treating Doctor for this case, I would ask you to do MRI cervical spine to assess any bony abnormality or disc herniation which may cause articular pain in your left arm. Also, I advise you to receive the following medications:-Muscle relaxant as Tizanidine -Pregabalin 150 mg once before sleep to improve the electric shock sensation. 