Non-invasive Neurostimulation for the Relief of Migraine

Inclusion Criteria: * Is between the ages of 18 and 55 years. * Has been previously diagnosed as suffering from migraine, in accordance with the IHS-Classification criteria (2nd) (with or without aura). * Experiences at least 2 migraines per month, but less than 15 headache days per month (over the last 3 months). * Has age of onset of migraine less than 50 years old. * Is able to distinguish migraines from other headaches (e.g. tension headache). * Agrees to withhold usual migraine medications until after stimulation treatment with the GammaCore device. * Agrees to follow all of the requirements of the study, including follow-up visit requirements, and is sufficiently trained with respect to the operation of the GammaCore device and the data collection procedures. * Agrees to report use of the GammaCore device, study data, and any adverse device effects to the study center within 24 hours of treatment(s), and agrees to schedule an office visit 4-10 days after the third and final treatment, or when 6 weeks has passed, whichever comes first. * Is able to give written Informed Consent, or his/her legally authorized representative is available to give written Informed Consent. Exclusion Criteria: * Has a history of aneurysm, bleed, brain tumors or significant head trauma. * Has a lesion (including lymphadenopathy) at the therapy head placement site. * Has known or suspected severe atherosclerotic cardiovascular disease, carotid artery disease (e.g. bruits or history of TIA or CVA) or congestive heart failure (CHF). * Has a history of epilepsy. * Has suspected or confirmed sepsis, or infection. * Has a clinically significant irregular heart rate or rhythm. * Is receiving pressors to maintain blood pressure. * Has a history of syncope. * Is currently implanted with an electrical and/or neurostimulator device, including but not limited to cardiac pacemaker, vagal neurostimulator, deep brain stimulator, spinal stimulator, bone growth stimulator, or cochlear implant. * Has been implanted with metal cervical spine hardware. * Has a history of carotid endarterectomy or vascular neck surgery on the right side. * Has a condition that would interfere with headache pain self-assessment. * Is pregnant or is thinking of becoming pregnant in the next 6 weeks. * Is participating in any other therapeutic clinical investigation or has participated in a clinical trial in the preceding 30 days. * Takes medication for acute headaches more than 10 days per month. * Has a history or suspicion of substance abuse * Belongs to a vulnerable population or has any condition such that his or her ability to provide informed consent, comply with follow-up requirements, or provide self-assessments is compromised (e.g., homeless, developmentally disabled, prisoner).