A new article in August 2020 in Womens Midlife Health “Cortical and subcortical changes following sphenopalatine ganglion blocks in chronic migraine with medication overuse headache: a preliminary longitudinal study.” looks at how Sphenopalatine Ganglion (SPG) Blocks offer significant improvement in chronic migraine related to medication overuse headache. It is well known the Sphenopalatine Ganglion (SPG) Blocks are one of the …