Nerivio is a drug-free, prescription wearable device for migraine treatment, using Remote Electrical Neuromodulation (REN) applied to the upper arm to activate the brain's natural pain-relief pathways, controlled by a smartphone app for self-administration during attacks, offering a non-invasive alternative for patients 8+. It stimulates nerves to trigger the release of pain-inhibiting neurotransmitters, providing relief without pills or systemic side effects.