Hi, Thanks for asking. Based on your query, my opinion is as follows. 1. Get an X-ray done to evaluate for vertebral compression. 2. Compression of nerves in between the vertebrae can cause electric shock like pain on back. 3. Nerve compression might be causing different sensations, and itching may be due to this. Get an X-ray done or MRI. Hope it helps. Any further queries, happy to help again.