Hi ScubaPastor,
Following up on TSandM's lead, this condition possibly could be the result of what is called "reverse seasickness," "land sickness" or ""mal de debarquement (although technically this latter term refers to a more serious and long-lasting, and sometimes permanent, condition)."
The following DAN item on "land sickness" -->
DAN Divers Alert Network : Motion Sickness indicates: " And what about the reverse: sickness on land? It does happen. After you have finished that 10-day "trip of a lifetime" aboard a liveaboard and have stepped onto solid ground, you may suddenly feel funny and maybe even sick. What happened? "Land sickness" occurs when you return to dry land after becoming adapted to an environment in constant motion. Your brain has become accustomed to the new input from increased motion. Suddenly, the motion stops. The abrupt change will promptly produce the same symptoms as originally felt upon going to sea."
Mal de debarquement is discussed here -->
MdDS Balance Disorder Foundation
Alternatively, middle or inner ear barotruama or inner ear DCS also can manifest with a similar sensation, but typically involve other symptoms as well, such as impaired hearing, ear discomfort and tinnitus.
It may be wise to consult an ENT if matters don't improve in a day or two.
Regards,
DocVikingo
This is educational only and does not constitute or imply a doctor-patient relationship. It is not medical advice to you or any other individual, and should not be construed as such.