Chronic migraine is a disabling neurological condition affecting 0.5-2% of the population.
CM is difficult to treat and preventive treatment options are limited. Due to the inefficiency of available and the lack of new preventive anti-migraine drug, neurostimulation methods have raised great interest in recent years.
The ONSTIM study showed a reduction in headache frequency in 39% of patients treated with active ONS during 12 weeks, compared to no improvement in the "non-effectively" stimulated or medically treated groups.
