How Does Air Pressure Affect The Ear?

Blocked Ears And Eustachian Tubes

The Eustachian tube can be blocked, or obstructed, for a variety of reasons. When that occurs, the middle ear pressure cannot be equalized. The air already there is absorbed and a vacuum occurs, sucking the eardrum inward and stretching it. Such an eardrum cannot vibrate naturally, so sounds are muffled or blocked, and the stretching can be painful. If the tube remains blocked, fluid (like blood serum) will seep into the area from the membranes in an attempt to overcome the vacuum. This is called "fluid in the ear," serous otitis, or aero-otitis.

The most common cause for a blocked Eustachian tube is the common cold. Sinus infections and nasal allergies (hay fever, etc.) are also causes. A stuffy nose leads to stuffy ears because the swollen membranes block the opening of the Eustachian tube.

Children are especially vulnerable to blockages because their Eustachian tubes are narrower than adults.

The Three Parts Of The Ear 

• The outer ear: the part that you can see on the side of the head plus the ear canal leading down to the eardrum.
• The middle ear: the eardrum and ear bones (ossicles), plus the air spaces behind the eardrum and in the mastoid cavities (vulnerable to air pressure).
• The inner ear: the area that contains the nerve endings for the organs of hearing and balance (equilibrium).

How To Unblock Your Ears

Swallowing activates the muscle that opens the Eustachian tube. You swallow more often when you chew gum or let mints melt in your mouth. These are good air travel practices, especially just before take-off and during descent. Yawning is even better. Avoid sleeping during descent, because you may not be swallowing often enough to keep up with the pressure changes. (The flight attendant will be happy to awaken you just before descent).

If yawning and swallowing are not effective, unblock your ears as follows:

• Step 1: Pinch your nostrils shut.
• Step 2: Take a mouthful of air.
• Step 3: Using your cheek and throat muscles, force the air into the back of your nose as if you were trying to blow your thumb and fingers off your nostrils.

When you hear a loud pop in your ears, you have succeeded. You may have to repeat this several times during descent.

Babies' Ears

Babies cannot intentionally pop their ears, but popping may occur if they are sucking on a bottle or pacifier. Feed your baby during the flight, and do not allow him or her to sleep during descent.

Precautions

• When inflating your ears, you should not use force. The proper technique involves only pressure created by your check and throat muscles.
• If you have a cold, a sinus infection, or an allergy attack, it is best to postpone an airplane trip.
• If you recently have undergone ear surgery, consult with your surgeon on how soon you may safely fly.

What About Decongestants And Nose Sprays?

Many experienced air travelers use a decongestant pill or nasal spray an hour or so before descent. This will shrink the membranes and help the ears pop more easily. Travelers with allergy problems should take their medication at the beginning of the flight for the same reason.

Decongestant tablets and sprays can be purchased without a prescription. However, they should be avoided by people with heart disease, high blood pressure, irregular heart rhythms, thyroid disease, or excessive nervousness. Such people should consult their physicians before using these medicines. Pregnant women should likewise consult their physicians first.

If Your Ears Will Not Unblock

Even after landing you can continue the pressure equalizing techniques, and you may find decongestants and nasal sprays to be helpful. (However, avoid making a habit of nasal sprays. After a few days, they may cause more congestion than they relieve). If your ears fail to open, or if pain persists, you will need to seek the help of a physician who has experience in the care of ear disorders. He/she may need to release the pressure or fluid with a small incision in the ear drum.

Reprinted with permission of the American Academy of Otolaryngology—Head and Neck Surgery Foundation, copyright © 2007.  All rights reserved.