The stellate ganglion nerve block is an injection used to treat pain associated with shingles, frostbite, reflex sympathetic dystrophy, Reynaud’s disease, acute vascular insufficiency, and vascular headaches. It can also be used for complex regional pain syndromes affecting the head, face, neck, or arms. The injection includes the administration of local anesthetic and steroid medication around the ganglion nerves to block the pain signals. Common reactions following this procedure include nasal congestion, blood shot droopy eye on the side that the injection was given as well as a hoarse voice and a warm tingling sensation in the arm and hand which usually decreases after a few hours. If the first injection alleviates pain, then more injections will be ordered over time.