Even if you’ve never had a bout of motion sickness – you’re not out of the woods. You could develop adult-onset motion sickness at any time. That’s when you feel fine one moment. Then the next suddenly suffer from a queasy stomach, dizziness, and headaches.

So, what causes it? Dr. Timothy Hain is professor at Northwestern University Medical School. And he says you use you eyes and your ears to gauge your location and movement. But when those signals disagree, your brain goes into chaos mode, causing you to feel sick. 

For example, say you’re reading in the car. Your eyes think you should be still. But the bouncing of the car ride tells your ears that you’re moving. And that causes your body to go haywire and make you feel sick.

And experts say that adult motion sickness can strike you any time those signals cross – not just when you’re in a car. 

Like if you’re watching television while on a treadmill, scanning the aisles while grocery shopping, even looking at stripes on a shirt! That’s because a high contrast pattern can lead to visual distress. 

But you can relieve motion sickness without medication. In fact, NASA has invested millions of dollars over the years, looking for ways to help astronauts conquer motion sickness – without medication. And they say the best way to do it is by controlling your breathing. It may sound obvious, but forcing yourself to take smooth and even breaths will send signals to your brain, saying: “Hey, I’ve got things under control. Stop panicking!” So, try inhaling for three seconds, then exhale for three seconds, and then repeat.