This is off wiki, but gives you the general idea.
Vertigo caused by problems with the
inner ear or
vestibular system is called "peripheral", "otologic" or "vestibular". The most common cause is benign paroxysmal positional vertigo (
BPPV) but other causes include
Ménière's disease,
superior canal dehiscence syndrome,
labyrinthitis and visual vertigo.
[4] Any cause of inflammation such as
common cold,
influenza, and bacterial infections may cause transient vertigo if they involve the inner ear, as may chemical insults (e.g.,
aminoglycosides) or physical trauma (e.g., skull fractures).
Motion sickness is sometimes classified as a cause of peripheral vertigo.
So yeah, possibly your cold mate.