Meniere's disease is an inner ear disorder that causes episodes of extreme dizziness, hearing loss, ringing in the ears, and a stuffy feeling in your ear. The disorder usually affects just one ear. The dizziness, or vertigo, can be so severe that it causes the person to lose balance and fall. Meniere's disease occurs when fluid builds up inside a part of the inner ear called the labyrinth. Doctors are not sure what leads to this fluid buildup, but genetics may play a role. Meniere's disease most often affects people ages 40 to 60. Follow the links below to find WebMD's comprehensive coverage about Meniere's disease, what the symptoms are, how to treat it, and much more.