The SPG Block or Spenopalatine Ganglion Block is often touted as the miracle headache cure. There are various methods of doing sphenopalatine ganglion blocks. The Sphenopalatine Ganglion or SPG Ganglion is an parasympathetic autonomic ganglion found in the pterygopalatine fossa. It is also called the Pterygopalatine Ganglion and the Nasal Ganglion. The Sphenopalatine Ganglion Block has been called the “Miracle …