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What Is Motion Sickness?

Understanding why your body rebels during travel — and how to stop it.

Motion sickness affects up to 1 in 3 people. It's not a disease — it's your brain's normal response to conflicting signals from your eyes, inner ear, and body.

What Causes Motion Sickness?

Your brain relies on three systems to understand movement: your eyes (vision), your inner ear (vestibular system), and your body's position sensors (proprioception). Motion sickness occurs when these signals conflict.

For example, reading in a car: your eyes see a stationary book, but your inner ear senses acceleration, braking, and turns. Your brain interprets this conflict as a potential toxin exposure and triggers nausea as a protective response.

This is why drivers rarely get motion sick — they can see and anticipate the road ahead, so their visual and vestibular signals match.

Common Symptoms

  • Nausea and stomach discomfort
  • Cold sweats and pallor
  • Dizziness and lightheadedness
  • Fatigue and drowsiness
  • Increased salivation
  • In severe cases, vomiting

How to Prevent Motion Sickness

  • Sound Therapy (100 Hz) — A peer-reviewed Nagoya University study found that 60 seconds of 100 Hz sound activates the otoconia in your inner ear, reducing motion sickness for up to 2 hours. This is the approach Stillwave uses.
  • Medication — Dramamine (dimenhydrinate) and scopolamine patches are effective but cause drowsiness and other side effects.
  • Behavioral Tips — Look at the horizon, sit in the front seat, keep fresh air flowing, avoid reading, and eat light meals before travel.
  • Acupressure — Wristbands that press on the P6 point may help some people, though clinical evidence is mixed.

Frequently Asked Questions

Can you outgrow motion sickness?

Motion sickness peaks in childhood (ages 6-12) and often decreases with age. However, many adults continue to experience it, especially in cars, boats, and VR headsets.

Why do some people get motion sick and others don't?

Sensitivity varies based on genetics, vestibular system development, and experience. Women are more susceptible than men, and people who get migraines are also more prone to motion sickness.

Is motion sickness dangerous?

No. It's uncomfortable but not harmful. Symptoms resolve quickly once the motion stops. In very rare cases, prolonged vomiting can cause dehydration.

Related articles

100 Hz Sound Therapy

The peer-reviewed science behind Stillwave.

The Vestibular System

Your inner ear's balance system — and why it causes motion sickness.

Noise-Cancelling Earbuds & Motion Sickness

Why AirPods Pro are recommended — but not required.

Try Stillwave

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