Page last updated
22 November 2022
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.