Ear barotrauma is a type of ear damage. It is caused by pressure differences between the inside of the ear and the outside of the ear. It can cause pain and sometimes lifelong (permanent) hearing loss.
The middle ear is an air-filled space between the inner and outer parts of the ear. It contains three small bones that help transmit sound. It also contains the opening of the eustachian tube, which connects to an area behind the nose. This tube stays closed most of the time.
For your hearing to work normally, the pressure inside the middle ear has to match the air pressure in your environment. If the external pressure is greater or less than the middle ear pressure, the eustachian tube should open. This equalizes the pressure between the middle ear and the outside.
Sometimes the eustachian tube can't open normally when there are changes in pressure. When that happens, the difference in pressure can damage the eardrum. The eardrum separates the outer and middle ear. This might cause bleeding or other damage to the outer, middle, or inner ear.
People of all ages can have ear barotrauma. It is common in scuba divers. Air travel is also a common cause of ear barotrauma.