Headache, migraine, tension headache, hemicrania, cluster headache, pressure, dropper How to use: Insert the dropper into the ear canal while it is pressed, and wait 20 seconds to adjust the internal pressure, which will relieve the headache. According to research, there is an organ in the inner ear that regulates the autonomic nerves, and headaches caused by changes in atmospheric pressure seem to be due to the inability to regulate it properly. The same organ in the ear is also why you can clear your ears by swallowing water on airplanes or in high-rise elevators. Shipped without the outer box. Shipping with the box is available for an additional 400 yen. Headache, migraine, tension headache, hemicrania, cluster headache, pressure dropper