Chewing sugar-free gum can help stimulate saliva production, which can help stimulate the Eustachian tube. The act of chewing also helps to open the jaw and relieve pressure on the ear.

Moving the jaw is another simple way to equalize pressure. Yawning widely or shifting your jaw from side to side can stretch the muscles surrounding the eustachian tubes, encouraging them to vent. If you cannot yawn on command, try "fake" yawning by opening your mouth wide and inhaling deeply. Chewing gum or sucking on hard candy during and after the flight also helps because it triggers frequent swallowing, which is the body's natural way of regulating ear pressure.