This study is a multi-center, triple-blinded, placebo-controlled, randomized clinical trial for adjunctive prophylactic treatment of episodic migraine headache (with or without aura) using neuromodulation device developed by Scion NeuroStim, LLC (SNS). The investigational use of the device for episodic migraine headache has been reviewed by the FDA and is classified as NSR (non-significant risk).