Open your mouth wide as if yawning, or take a sip of water and swallow deliberately. Chewing gum or sucking on a hard candy also encourages natural swallowing.
After landing, you may feel pressure, muffled hearing, or discomfort in your ears. This happens when the Eustachian tubes—which equalize pressure between your middle ear and the environment—get blocked. Here are safe ways to open them: how to pop ears after plane ride
Drinking water thins mucus, which may be blocking the tubes. Open your mouth wide as if yawning, or