When you fly, the rapid change in air pressure causes a pressure imbalance across your eardrum, leading to that familiar sensation of fullness, muffled hearing, or outright pain. This happens because the air trapped in your middle ear is at a different pressure than the cabin air around you, and a small tube connecting your middle ear to your throat can’t always keep up with the change.
Why Your Ears Feel Blocked During a Flight
Your middle ear is a small, air-filled space sealed off from the outside world by your eardrum. The only way air gets in or out is through the Eustachian tube, a narrow passageway that runs from the middle ear down to the back of your throat. Normally, this tube opens briefly when you swallow, yawn, or chew, letting air flow through to keep the pressure equal on both sides of the eardrum.
During takeoff, the cabin pressure drops as the plane climbs. The air in your middle ear is now at a higher pressure than the cabin, so it pushes outward on the eardrum, which can cause a mild popping sensation. Most people handle ascent fairly well because the excess air can escape through the Eustachian tube without much effort.
Descent is where the real trouble starts. As the plane drops altitude, cabin pressure rises, pushing your eardrum inward. For the pressure to equalize, air needs to flow up through the Eustachian tube into the middle ear. But the tube doesn’t open passively in that direction as easily, so the pressure difference can build. That’s why ear pain during flying almost always hits on the way down.
What It Feels Like, From Mild to Severe
The symptoms follow a predictable progression. At first, you’ll notice a sense of fullness or dullness in one or both ears. If the pressure difference keeps growing, that fullness becomes genuine discomfort and then escalates to sharp pain. Many people also experience muffled hearing because the eardrum can’t vibrate normally when it’s being stretched inward.
In more serious cases, fluid or even blood can accumulate in the middle ear space, significantly reducing hearing for days or weeks. If the pressure becomes extreme, the eardrum can actually rupture. When that happens, people typically describe worsening pain that suddenly improves, followed by noticeable hearing loss. Eardrum rupture from commercial flying appears to be extremely rare, and most perforations heal on their own without surgery. However, the fluid buildup and hearing loss from a bad episode of pressure injury can persist for a month or longer.
In the most severe (and very uncommon) cases, inner ear damage can occur, causing ringing in the ears, dizziness, nausea, or sensitivity to sound.
Why It’s Worse When You’re Congested
Anything that narrows or blocks the Eustachian tube makes it harder for air to pass through, and that turns a manageable pressure change into a painful one. A head cold, sinus infection, ear infection, or allergies all cause swelling in the tissues around the tube. The CDC notes that travelers with ear, nose, or sinus infections might want to consider postponing flights to prevent pain or injury. If you can’t reschedule, an oral or nasal decongestant before the flight can help keep the tube open enough to function.
One clinical trial found that taking an oral decongestant 30 minutes before departure cut the rate of ear discomfort nearly in half: 32% of passengers who took it experienced pain, compared to 62% of those who didn’t.
Why Children Struggle More
Babies and young children are more prone to ear pain during flights because their Eustachian tubes are shorter, narrower, and more horizontal than an adult’s. That geometry makes it harder for air to move through the tube, and young children can’t deliberately perform the techniques adults use to equalize pressure. This is a major reason why infants often cry during descent. Giving a baby a bottle or pacifier encourages swallowing, which can help open the tube.
How to Equalize the Pressure
Two simple techniques can force the Eustachian tube open during descent:
- Valsalva maneuver: Pinch your nose shut, close your mouth, and gently blow as if you’re trying to exhale through your nose. This pushes air up through the Eustachian tube into the middle ear. Don’t blow hard, as too much force can cause damage.
- Toynbee maneuver: Pinch your nose shut and swallow. The swallowing motion pulls the Eustachian tube open while the closed nose directs air movement toward the middle ear.
You don’t need to wait until your ears hurt. Start these techniques as soon as the plane begins its descent, and repeat every few seconds until you land. Chewing gum, yawning, or sipping water also promote swallowing and can help keep pressure balanced throughout the flight.
Pressure-Regulating Earplugs
Specialty earplugs designed for flying use a small filter to slow down how quickly pressure changes reach your eardrum. They don’t block the pressure change entirely; instead, they delay it by about 7 minutes, giving your Eustachian tube more time to catch up. In pressure chamber testing, people wearing these plugs reported significantly less discomfort than without them, even though their actual Eustachian tube function didn’t improve. They’re a useful option if you consistently have trouble equalizing, especially combined with swallowing or the Valsalva maneuver.
When Flying Gets Risky
For most healthy people, the ear pressure from a flight is uncomfortable but harmless. The situation changes if you have active swelling in your Eustachian tubes from illness or if you’ve recently had ear surgery. In these cases, the tube may be completely unable to equalize pressure, turning a routine descent into a scenario where fluid buildup, bleeding behind the eardrum, or perforation become real possibilities.
If you land and your hearing is noticeably muffled, you have persistent pain, you’re dizzy, or you notice fluid draining from your ear, those are signs of barotrauma that go beyond normal post-flight ear popping. Muffled hearing that clears within a few hours is common and not a concern. Symptoms lasting more than a day suggest fluid has accumulated in the middle ear and may take weeks to fully resolve.