Nausea comes from the ancient Greek word "naus" meaning "ship".
Sea sickness is caused by a mismatch of the information from your eyes and ears. Foward motion combined with up and down motion, or side to side motion causes this illness. Your inner ear regulates balance, and when you get contradictory signals, your brain get disoriented, causing nausea.
According to Health Canada, sea sickness (motion sickness) is greatest between the ages of 3 and 12. It affects 58% of children. Women are more susceptible than men, and the problem declines with age. Boats cause the worst problems, followed by planes, cars, and trains.
Although ginger root is often mentioned as a folk remedy, a controlled study found no anti-seasickness effect.
Pressure bands are sold that you wear around each wrist. The plastic button is supposed to press against an acupuncture point in your wrist to relieve motion sickness and other forms of nausea. Two scientific studies found an example of thse bands had no effect on motion sickness. Another study found that vigorous manipulation of the acupuncture point was required to achieve any benefit.