The reported improvements are too dramatic for this to be some subtle shift of perception in the patient.
Theories including acupuncture and placebo, have been put forward as to how and why it works. The most recent studies however, are pointing towards stimulation of the vagus nerve as being the cause of radical improvement in the pursuit for an effective treatment for migraine,. It is impossible for any kind of stimulation of the vagus nerve to be specific to one condition.
Effects are often instantaneous, resulting in an immediate sense of wellbeing.
What is claimed anecdotally/experientially is borne out statistically. Based on both clinical and funded research, VNS Daith Piercing has no reservations in recommending Daith Piercing as the “go to” way of vagus nerve stimulation as a medical treatment for migraine and a host of other conditions.