the distressing symptoms of motion sickness usually stop when the motion that causes it ceases. but this is not always true. there are people who suffer symptoms for even a few days after the trip is over. this is called the "mal d'embarquement" syndrome or more properly the "mal de debarquement" syndrome. ("mal d'embarquement" is embarkment or departure sickness while "mal de debarquement" is disembarkment or arrival sickness. )
when does the nausea and vomiting of motion sickness stop?