What Causes Motion Sickness? | Live Science

The rocking momentum of a train, car or boat is soothing to some people, but for others, it generates feelings of extreme discomfort — dizziness, nausea and even vomiting.

This condition, known as motion sickness, can strike travelers of all ages, though it appears most frequently in children. The motion that is unique to travel is the most common culprit, but speedy loops and lurches in amusement park rides and the disorienting perspective of moving cameras in 3D movies or virtual-reality environments can also trigger queasiness.

While motion sickness isn’t life-threatening, its symptoms can be extremely unpleasant, transforming an otherwise pleasant journey into a stomach-turning nightmare. Why does this particular type of movement make some people feel ill?

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