Meniere's disease is a disorder of the inner ear that causes severe spells of vertigo, making you feel like you're spinning. You can also have hearing loss, ringing (tinnitus, pronounced either TINN-itus or tinn-UH-tus)) or a feeling of fullness in your ear. (It usually affects just one ear). Doctors don't fully understand Meniere's Disease but suspect that its caused by a combination of how fluid drains (or does not drain) from your ear, allergies, viruses and genes. There is no known cure for Meniere's Disease, but vertigo is treatable.