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What is seasickness?

Page last updated 07 July 2020

Seasickness is the body’s response to certain types of movement. It is thought that there is a mismatch between what the brain is told by your balance system in your inner ear, and what your eyes are seeing. For example, on a boat your eyes may be telling your brain you are still, but your balance system senses that there is a rocking motion and sends that information to the brain as well. The result is a raft of symptoms that are generally not serious, although frequent vomiting can lead to dehydration and low blood pressure.

Sources & Citations

  1. Victoria State Government. Better Health Channel. Motion sickness. Available at: (accessed 17 June 2020).


MAT-AU-2000132 - Date of preparation June 2020