I submit observations from personal experience with my own Ménière's disease and report anecdotal case studies of my patients to seek corroboration from your specialty.
As an ophthalmologist, I frequently evaluate patients for a possible ocular contribution to “dizziness” symptoms that seem vertiginous. Review of systems almost always discloses a history of chronic sinus congestion, postnasal drip, frequent or chronic sinusitus, and/or allergies. One commonly affected group seems to be pilots and flight attendants. Often, their symptoms match the kind of vaguely “seasick” feeling I experience intermittently between true vertigo bouts with Ménière's disease.
McMillan JJ. Fungus Sensitivity as a Cause of Ménière’s Disease?. Arch Otolaryngol Head Neck Surg. 2005;131(9):830. doi:10.1001/archotol.131.9.830