Because the surrounding water pressure will push it that way.
In the sea, the external water pressure is greater than the ear's internal air pressure, so it implodes. In space, the external vacuum is less pressure than the ear's internal air pressure, so it explodes (or is 'sucked' into space.)
Too much pressure can rupture an eardrum. For example, I ruptured my brother's eardrum many years ago with one of those pool noodles. We were fighting with them in the pool and I smacked him in the side of the head with it. The force of impact directly over his ear created enough pressure inside of his ear cavity to actually rupture his eardrum. Another thing that can rupture/burst an eardrum is simply sticking something that doesn't belong inside of your ear too deep, physically puncturing the eardrum. Although eardrums can burst, they can also heal. However, the older you get, the more difficult it becomes for your body to repair an eardrum.
A diver cannot go too deep at sea without breaking his eardrum because the more deeper you go under the water the more harder the presseure get and your eardrum is justa thin piece of skin and if that breaks you could become deth or you ear might get really infected.
I personally don't think it's too bad, unless you go too deep. My sister poked one in her ear when she was small and burst her eardrum. She had to be taken to the hospital and she got a new eardrum. She's fine now, it's been quite a while. We still bug her today that she's too deaf. :P But overall, i believe they're fine unless you poke it too deep into your ear. My mom thinks q-tips are really dangerous though, after the incident.
Anything but a deep subsurface burst or a burst in outer space.
magma
The eardrum, also known as the tympanic membrane, is located about 0.6 inches (1.5 centimeters) deep into the ear canal. This thin barrier separates the outer ear from the middle ear and serves to transmit sound vibrations to the inner ear.
deep mining is how coal removed
how do I treat deep cut under foot
The crust under the ocean is typically about 3 to 5 miles (5 to 8 kilometers) deep.
No, they are adapted for living in deep water. The reduction in pressure would make them burst from the inside out.
When diving to the bottom of a deep pool, the increase in water pressure compresses the air inside the middle ear. This pressure differential can cause discomfort or pain due to the unequal pressure on both sides of the eardrum. Techniques such as equalizing pressure through methods like swallowing, yawning, or pinching the nose and blowing gently can help alleviate this discomfort.