Transcranial Magnetic Stimulation For Visual Snow Syndrome

Inclusion Criteria: * A diagnosis of VS that meets International Headache Society criteria * Able to provide meaningful informed consent * Visual snow must be present for more than three months and must be persistent (i.e. continuous) * A prior clinical Brain MRI with and without contrast done in the past 3 years that does not show signs of clinically significant brain lesions (no evidence of multiple sclerosis, stroke, brain tumor, cortical heterotopia or other cortical developmental abnormalities, arteriovenous malformation, etc…) Exclusion Criteria: * Syndrome meeting criteria for Hallucinogen-persisting perception disorder * Prior treatment with TMS for any disorder * Epilepsy, family history of epilepsy, or personal history of seizure * Any medical condition or medication that increases the risk of seizure * Pacemaker or other implantable medical device * Metal in the skull, not including the mouth * Unstable cardiac, pulmonary, or other systemic illness * Pregnancy * Bipolar disorder * History of suicidality