Your ears pop on a plane because the air pressure inside your middle ear and the air pressure in the cabin are temporarily mismatched. Behind your eardrum sits a small, air-filled space that connects to the back of your throat through a narrow channel called the Eustachian tube. When the plane climbs or descends and cabin pressure shifts, the air trapped in that space either expands or contracts, pushing your eardrum inward or outward. The “pop” you feel is your Eustachian tube briefly opening to let air flow through and rebalance the pressure on both sides.
How Pressure Changes Affect Your Ear
A basic physics principle explains what’s happening: when outside pressure drops (during ascent), gas in a sealed space expands, and when outside pressure rises (during descent), that gas compresses. Your middle ear is essentially a sealed pocket of air. As the plane climbs and cabin pressure decreases, the air inside your middle ear expands and pushes outward against your eardrum. During descent, the reverse happens. Cabin pressure increases, and the air in your middle ear shrinks in volume, pulling your eardrum inward. Either direction creates an uncomfortable sense of fullness or pressure.
The Eustachian tube is your body’s built-in pressure valve. At rest, it stays closed. It opens briefly about 1.4 times per minute in normal life, staying open for roughly 0.4 seconds each time. Two small muscles in your throat trigger this opening whenever you swallow, yawn, or chew. When the tube opens, air rushes in or out of the middle ear to match the surrounding pressure, and you hear or feel that familiar pop. A thin layer of natural surfactant inside the tube helps reduce the effort needed to pry it open, much like soap reduces the surface tension of water.
Why Descent Is Worse Than Ascent
Most people notice more discomfort when the plane is landing than when it’s taking off, and there’s a structural reason for that. During ascent, the expanding air in your middle ear can passively push the Eustachian tube open from the inside and escape on its own. During descent, the situation reverses: rising cabin pressure presses the soft walls of the Eustachian tube together, effectively sealing it shut. Your body has to actively force the tube open (by swallowing or yawning) to let air back in. If you can’t equalize fast enough, the pressure difference locks the tube closed even tighter, making each subsequent attempt harder.
Why It’s Worse When You’re Sick
A head cold, sinus infection, or allergies can turn routine ear popping into genuine pain. When the tissues lining your Eustachian tube are swollen or coated in thick mucus, the tube has trouble opening at all. The pressure difference builds with no way to release, stretching the eardrum and sometimes forcing fluid into the middle ear. The CDC notes that air pressure changes during flight can facilitate the development of sinus infections and middle ear infections in travelers with preexisting congestion. A vasoconstricting nasal spray used just before the flight can shrink swollen tissue enough to keep the tube functional.
Why Babies Cry During Landing
Infants and toddlers are especially prone to ear pain in flight, partly because they can’t deliberately pop their ears the way adults can. Their Eustachian tubes are also shorter, more horizontal, and more easily blocked by even mild swelling. Interestingly, children have a much smaller air-filled space (called the mastoid) behind the ear, which actually changes how pressure shifts affect them. Oral decongestants that help adults have not been shown to be effective in children. Encouraging a baby to nurse, take a bottle, or use a pacifier during descent triggers swallowing and gives the Eustachian tubes their best chance of opening.
How to Equalize the Pressure
Several techniques can help you pop your ears when swallowing alone isn’t doing the job:
- Valsalva maneuver: Pinch your nostrils shut and gently blow through your nose. The slight pressure buildup in your throat pushes air up through the Eustachian tubes. The key word is gently. Blowing too hard won’t open a stubbornly locked tube and can actually raise pressure inside the inner ear enough to cause damage.
- Toynbee maneuver: Pinch your nostrils shut and swallow at the same time. Swallowing pulls the Eustachian tubes open while the closed nose compresses a small pocket of air against them. Many people find this more natural than the Valsalva.
- Edmonds technique: Tense the muscles at the back of your throat and the roof of your mouth, push your jaw forward and down, then do a Valsalva. This combines muscle activation with forced air pressure and can work when simpler methods fail.
Chewing gum or sucking on hard candy during ascent and descent works for the same reason: it keeps you swallowing regularly, which opens the Eustachian tubes before a significant pressure gap has time to build.
Pressure-Regulating Earplugs
Filtered earplugs marketed for flying don’t block the pressure change entirely. Instead, they slow it down. By placing a small filter in the ear canal, they delay the rate at which outside pressure reaches your eardrum, giving your Eustachian tubes more time to equalize naturally. Testing in a pressure chamber found that these plugs delayed the maximum pressure change by about 7 minutes. That buffer can be enough to keep discomfort minimal, especially during rapid descents.
When Ear Pain Becomes a Problem
For most people, the pressure sensation resolves within minutes of landing. Minor discomfort or muffled hearing that lingers for a few hours is common and usually clears on its own. More significant injury to the eardrum or middle ear, called barotrauma, can take weeks or even months to fully heal.
The warning signs that something beyond routine popping has occurred include hearing loss that doesn’t bounce back after a few hours, a sudden onset of dizziness or vertigo after the pressure change, persistent pain, or any fluid draining from the ear. These symptoms can indicate a ruptured eardrum or, more rarely, damage to the delicate structures of the inner ear. A persistent or large eardrum perforation sometimes requires surgical repair, though most small tears heal on their own with time.