Went to a chiropractor dec 19, the next day my left shoulder and neck were in so much pain.instarted getting an electrical shock/ major tingling from shoulder muscle to upper arm and down to thumb and forefinger. Notice a big bruise on upper left shoulder Muscle from goofing around. Went to another chiropractor and had hospital X-ray s ...said trigger point problem mild cervical spont..what is causing the shocks