The vagus nerve stimulation group will perform two sessions per day (morning and evening), each lasting approximately 30 minutes, for a total of 1 hour of auricular transcutaneous vagus nerve stimulation. This arm will continue using the active treatment for 8 weeks.

The sham control group will will perform two sessions per day (morning and evening), each lasting approximately 30 minutes, for a total of 1 hour of daily stimulation using the sham device. After 4 weeks, the sham control group will begin active auricular transcutaneous vagus nerve stimulation for 4 weeks.

The sham control uses the same stimulation devices as the active group, but with modified electrodes that do not emit electrical current. Instead, they produce a mechanical vibration or clicking sensation that mimics the feeling of stimulation without delivering current to the skin.

The Dizziness Handicap Inventory (DHI) is a 25-item questionnaire assesses physical, emotional, and functional aspects of dizziness. Each of the 25 questions has three answers: "Always" (4 points), "Sometimes" (2 points), or "No" (0 points). Scores are summed for a total from 0 (no disability) to 100 (maximum disability).

The Hospital Anxiety and Depression (HAD) is a self-reported 14 item questionnaire asking participants to reflect on their mood in the past week. . Each item is rated on a 4-point scale, for a total score ranging from 0-21 for each subscale. A higher score indicates higher distress. Clinically meaningful change is defined as a ≥2-3-point reduction.