As the plane ascends or descends, the fluctuations in cabin pressure put additional stress on your Eustachian tube. This is the small tube in your throat behind your nose that connects to the air-filled space behind your eardrums. The changes in air pressure can create a feeling of fullness and a popping or cracking sounds.
You may have heard this referred to as "airplane ear."
How long does airplane ear last?
On average, the sensation can last up to 30 minutes. However, if you experience airplane ear longer than an hour, seek medical assistance. Remember, popping in the ear most commonly occurs during take off/landing, so if you're experiencing the same sensation when pressure is equalized, it could indicate another issue.