It can be a real pain in the ear.
Ear pressure usually happens when your flight is ascending or descending. Typically, the air pressure inside your ear and the air pressure in the environment are equal. However, when you are flying, the air pressure can change too quickly and there’ll be an imbalance in the air pressure on the inside of your ear and the environment, thus causing discomfort or even pain.
When the plane is ascending or descending, try swallowing your saliva repeatedly. Alternatively, you can suck on hard candy, which encourages you to swallow your saliva continuously too. This helps the air to reach even your inner ear, so air imbalance can be avoided.
Alternatively, you can try wearing earplugs during the ascent and descent of your flight too. There are earplugs made for flying, which help to equalise ear pressure and prevent your ears from popping.
Avoid sleeping during takeoff and landing too. When you’re in slumberland, you tend to swallow less, increasing the chances of your ears popping afterwards.
If unfortunately, your ears get clogged after a flight, try holding your nose and closing your mouth while breathing out slowly. This helps to push the air out of your ear. Repeat every few minutes till your ears are clear.
You can try yawning repeatedly as well. This also helps to clear your ear’s passageway and relieves the air pressure by allowing air to escape or enter your ears. Drinking plenty of water can help to clear your congested ears too.