Delivering Transcutaneous Auricular Neurostimulation to Reduce Heavy Menstrual Bleeding in Patients With and Without Von Willebrand Disease

This study is designed as an open label, two-arm, decentralized clinical study in which patients with heavy menstrual bleeding (HMB) will receive tAN, which targets the auricular branch of the vagus nerve (ABVN) and the auriculotemporal nerve (ATN). Participants will be enrolled into one of two cohorts of the study over the course of two consecutive menstrual cycles. 1. Patients with VWD Type 1 who are on hormone therapy (n=15) 2. Patients with no known cause of HMB who are not currently on hormone therapy (n=15) During the First Menstruation (baseline), no tAN treatment will be delivered. Participants will estimate blood loss daily throughout the duration of the menstruation phase of their first menstrual cycle. Dysmenorrhea, a general quality of life assessment, and total duration of menstruation will be collected on the final day of first menstruation. During the Second Menstruation, participants will self-administer 2, 1-hour sessions (daily total of 2 hours) of active tAN daily beginning Day 1 of menstruation through the final day of second menstruation. Participants will estimate blood loss daily throughout the duration of the menstruation phase of their second menstruation. Dysmenorrhea, a general quality of life assessment, and total duration of menstruation will be collected on the final day of second menstruation.