Meniere's disease is a disorder of the inner ear that causes severe dizziness, hearing loss, and tinnitus. It results from a buildup of fluid in the inner ear that affects the balance system. While the cause is unknown, it may be related to issues with blood flow or genetic factors. Symptoms include episodes of vertigo lasting over 20 minutes along with temporary hearing loss and a feeling of fullness in the ear. Doctors diagnose Meniere's disease based on these symptoms occurring repeatedly. There is no cure, but treatment focuses on relieving symptoms like vertigo and hearing loss through dietary changes, medication, or surgery in severe cases.