Nausea and vomiting in a car is a manifestation of motion sickness. Motion sickness is a series of symptoms, mainly dizziness, when riding in a car, boat or airplane, and usually includes dizziness, nausea, vomiting and generalized cold sweat and other symptoms of plant nervous disorders. This condition is actually very common, and if the car or boat is very bumpy, anyone can develop motion sickness, but some people tolerate the bumps better. The prevention of this condition can be done by taking oral medication to prevent vertigo, such as Chafenamycin, half an hour before the car or boat ride, and after getting out of the car or boat ride, there is no need to continue using the medication, and the prevention effect is good. During the car or boat ride, you should avoid reading as much as possible, and look at a relatively fixed position in front of you, such as the horizon, which can reduce the appearance of motion sickness symptoms to a certain extent.