What causes the metallic taste in my mouth or flashing lights when using CES or treating on or near the head?
Close proximity to the nerves governing taste or the optic nerve in case of the flashing lights can stimulate these nerves causing the metallic taste or stroboscopic effect. This is not cause for concern and is normal in many patients. The flashing lights will go away when the stimulation is discontinued. If the metallic taste persists, rinse your mouth with water and it will go away.
