Seasickness is the discomfort felt by some people who travel on ships or other vessels. It is caused by the motion of the ship and the conflicting signals that the brain receives from the eyes, ears, and body's sensory organs.
Seasickness can be a major problem for cruise passengers, as it can spoil their enjoyment of the trip. There are a number of things that can be done to prevent or treat seasickness, including taking medication, using acupuncture, or eating ginger.