In most individuals, the sensation of rocking, bobbing, swaying, etc. following a cruise or other passive motion experience is transient. Symptoms lasting up to two weeks is considered within the normal range. A diagnosis of MdDS is usually only given to those whose symptoms last 30 days or more.
MdDS is often self-limiting, typically resolving within 4 months (median duration according to Cha et al, 2008).
Patients in remission may experience recurring bouts, often associated with a precipitating event, e.g., travel or high stress. Subsequent episodes are generally more prolonged but some patients experience a quick return to baseline.