Inclusion Criteria:  Patients aged 8-18 years visiting the Alberta Children's Hospital Emergency Department (ED) with an acute attack of migraine as per criteria B-E of the International Classification of Headache Disorders-3 criteria (ICHD-3):  B. Headache attacks lasting at least 2 hours (untreated or unsuccessfully treated)  C. Headache has at least two of the following four characteristics:  unilateral location pulsating quality moderate or severe pain intensity aggravation by or causing avoidance of routine physical activity (eg, walking or climbing stairs)  D. Also has least one of the following:  nausea and/or vomiting photophobia and phonophobia  E. Not better accounted for by another diagnosis in the opinion of the treating physician  Criterion A (at least 5 attacks) is not being used in this study because prior research has shown that removing criterion A increases the sensitivity of these criteria in the ED. The patient and their caregiver will also be required to understand spoken and written English. In addition, potential participants will be required to have an upper arm circumference of at least 20 cm to ensure optimal device fit and safety.  Exclusion Criteria:  Exclusion criteria include the following: allergy or contraindication to metoclopramide, ketorolac, or non-steroidal anti-inflammatories; implanted electrical device, febrile at triage, head trauma in the past 7 days, current secondary headache, pregnant or lactating.