Motion sickness, blocked ears, swollen ankles, headaches and stiff muscles are all common travel complaints, but most can be prevented with a little planning. How to prevent itSit in the front passenger seat if you’re travelling by car. DehydrationWhether you’re driving through the Karoo or flying across continents, it’s surprisingly easy to drink too little. Take regular breaks if you’re driving through high-altitude areas. Most travel discomforts improve once you’ve had a chance to move around, rehydrate or rest.