Zok ZŌK Migraine Relief Naturally Reduce Tension and Pressure Inside the Head

Naturally Reduces Tension and Pressure from Headache and Migraine Symptoms Through Inner Ear Pressure Stimulation. How ZŌK Works - ZŌK provides relief by stimulating the tympanic membrane, which activates the trigeminal nerve and a number of cranial nerves through inner-ear pressure modulation, thereby providing instant alleviation of stress, pressure, tension and pulsating discomfort. New in box. Never used. Two available. I have several of these and I can attest that it actually works!