Why does driving cause motion sickness?

Reading, looking down, or watching a nearby screen gives the eyes a relatively still view while the inner ear senses acceleration, braking, and turns. The mismatch can produce nausea, sweating, dizziness, headache, tiredness, or vomiting. Curvy roads, stop-start traffic, heat, strong smells, and looking down can intensify the effect.

Passengers are more vulnerable when they cannot see the road ahead. A driver may experience fewer symptoms because watching the road supplies visual information that matches the vehicle's movement, although driving can still be difficult when symptoms begin.

If you are a passenger, sit in a forward-facing seat, look at the distant road or horizon, keep your head supported, and use cool air. Avoid reading, gaming, and prolonged phone use. Eat a light meal before travel rather than travelling very hungry or overly full. Take breaks on longer journeys and sip water. A [Travel Health Consultation](/treatments/occupational-and-travel-medicine/travel-health-consultation/) can help with recurring travel symptoms.

Pull over safely and do not continue driving if you feel dizzy, drowsy, confused, or unable to focus. Arrange medical advice if episodes occur when you are not travelling, are becoming frequent, or continue after the journey. Seek urgent help for fainting, severe headache, weakness, trouble speaking, chest pain, breathing difficulty, repeated [Vomiting](/symptoms/vomiting/), or difficulty walking.

Ask whether your symptoms fit motion sickness or another balance problem, whether a medicine could contribute, and what options are safe if you must drive. Mention headaches, hearing changes, visual symptoms, and how quickly you recover. You can also describe your [Nausea](/symptoms/nausea/) pattern and the roads or seats that trigger it.