An uncomfortable and often painful “electric shock” sensation that travels through your spine and out into your peripheral limbs, and is exacerbated by valsalva maneuvers (coughing, sneezing, etc). This phenomenon is commonly seen as a result of cervical spinal cord injury (and in this case should be taken very seriously), but also can be a result of certain autoimmune conditions (Multiple Sclerosis, Lupus, Bechet’s disease) or a vitamin B12 deficiency.