First: I am in no way affiliated with the company. I am also a skeptic.
Now that is out of the way.
I started using an Alpha Stim CES unit at my psychologist for sleep disturbance and depression. The side effect was my migraines stopped. I still have neurology pain which I continue to medicate but the migraines stopped.
I purchased an Alpha Stim for home use and my extended medical plan reimbursed part of the unit.
Read up on it I hope it helps.