Have you had your travel sickness since childhood? A lot of kids grow out of any motion-related nausea before they reach adult age, so if you still haven’t it could be your brain hanging onto those feelings you had as a youngster. In a nutshell, it could be misinterpreting the information it receives when you’re in a moving car, train, boat or plane. Hypnotherapy can, in some cases, talk to your subconscious while you’re in a hypnotic state, showing your mind that the dizzy, unbalanced signal it’s receiving from your ears is wrong. It doesn’t work for everyone, but if you’ve tried everything else, this might be worth considering.