The answer is inflammation. During the flight, the dramatic pressure changes can irritate the delicate lining of the Eustachian tube. Even after the plane lands, the tube remains swollen shut. Fluid (or even a tiny amount of vacuum-sealed blood) can be drawn into the middle ear, creating a sensation of fullness.

The problem happens during . As the plane sinks toward the runway, the cabin pressure rises again. The air in your middle ear now becomes lower pressure than the air outside. Your eardrum gets sucked inward like a dented tin can. Your Eustachian tube, which is supposed to open and let new air in, can’t. It’s stuck.

This condition is technically called or "airplane ear." Why It Stays Blocked on the Ground If the tube is just stuck, why doesn’t it fix itself once you’re off the plane?

For millions of travelers, the dreaded "ear block" doesn’t end when the plane touches the ground. Sometimes, it lingers for hours, days, or even weeks. But what exactly is happening inside your head at 30,000 feet? The culprit is a tiny, bean-shaped tube called the Eustachian tube . This canal connects your middle ear to the back of your throat and nose. Its job is simple: to equalize air pressure.