Migraine is a leading cause of neurological disability worldwide. Existing treatments often rely on medications with side effects and limited long-term viability. DOU is a wearable device combining taVNS technology and acupressure for drug-free migraine therapy. It helps users to locate the ear acupuncture point location and detect the user's body data in real time. It gives electrical stimulation to relieve migraine when it occurs, and the user can also take the initiative to acupressure. Based on the data, it can analyze the type of migraine and the pattern of its onset, and give users independence and personalisation for migraine relief.