Meniere’s disease is a disorder of the inner ear that manifests with dizziness (vertigo), loss of hearing, sounds in the ears (tinnitus), nausea and vomiting. This type of ear disorder usually manifests separate episodes of these symptoms that can be very intense. The exact cause of Meniere's disease is unknown. In some cases, Meniere's disease may be related to a middle ear infection (otitis media) or a head injury. Other risk factors include recent viral illness, respiratory infection, emotional stress, fatigue, use of prescription or nonprescription drugs including aspirin, and a history of allergies, smoking, and alcohol use. There may be genetic risk factors as well that precede Meniere's disease.
It doesn’t seem likely that a cruise can provoke an episode of Meniere’s disease. Having motion sickness can create other problems, but motion sickness is not a precondition for developing Meniere’s disease.