Caused by the balancing mechanism in your inner {ear} being confused (e.g. eyes telling brain you are motionless, but motion of ship, car or plane telling inner ear you are moving).
If travelling by car, sit in front & keep your eyes on the road ahead. In a ship or plane, sit in the middle of passenger area. On a coach or bus, do not sit at the back or above wheels. Try sucking glucose sweets or take travel sickness tablets. However, do not take travel sickness tablets if you're driving, some varieties may make you drowsy. Avoid alcohol.
