Zok is the world's first consumer-friendly device that naturally reduces tension and pressure. Zok is a drug-free and consumer-friendly device that facilitates pneumatic neurostimulation insufflation (PNSI), which is a patented technology that gently stimulates cranial nerve 5, 7, 9 and 10, thereby alleviating the symptoms of tension and pressure t. Zok was invented by functional neurologist, Dr. John, and has been tested in over 100's of healthcare clinics throughout the United States and proven by over 500,000 sufferers. Directions of use: Method 1 (most common relief method) Step 1: Deflate Zōk by squeezing the rubber bulb between your fingers. Step 2: While deflated, gently insert Zōk into the outer ear to create an air-tight seal between the Zōk earbud and the ear. This seal should occur just past the entrance to the ear canal—similar to the positioning of an audio earbud. Do not insert the Zōk earbud any further than the entrance to the ear canal. If Zōk causes any discomfort , discontinue use immediately. Maintain the bulb in a deflated state. Step 3: Maintain Zōk in a deflated state for 20-30 seconds. User will experience a mild sensation of increased pressure. Step 4: Pinch the Zōk bulb and gently remove from the ear. Step 5:Perform steps 1-4 for second ear. Step 6: Repeat 3-5 times, or until pressure or tension has eased.