Many people often feel uncomfortable in their ears when they fly, why is this? It starts with the structure of the human body. The middle ear cavity and the nasal cavity are connected by a tube called the eustachian tube. Under normal conditions, air enters the eustachian tube, keeping the pressure inside the ear cavity in balance with the pressure from the outside world across the eardrum. When this duct is blocked, the pressure in the middle ear and the pressure of the outside air are not equal, and there is a feeling of occlusion in the ear, and hearing will be diminished, even producing pain. When the airplane rises and falls rapidly, the pressure of the surrounding air changes abruptly and the gas in the middle ear is not replenished quickly, so the air pressure in the eustachian tube is different from the air pressure in the outer ear, and symptoms such as ear congestion and hearing loss occur. In fact, in addition to flying, diving and climbing mountains can also produce this phenomenon due to too rapid a change in pressure, which can even cause bleeding or rupture of the eardrum in severe cases. There are some ways to help relieve this discomfort, such as swallowing, yawning, chewing candy and other actions, in addition, if the above methods are not effective, you can achieve the purpose of ventilation by pinching the nose and drumming, that is, first take a large breath, then pinch the nose, and then force the drum, you will hear a “boing” sound, that is, the sound of the eustachian tube open. If you do a few more puffs during takeoff and landing, I believe your ears will have an open feeling. If you still have persistent ear congestion or hearing loss after flying back to the ground, you should consult your doctor and receive appropriate treatment.