Why you get motion sickness in the car: scientific reasons and proven ways to combat it

Nausea, dizziness and cold sweats during a trip - these symptoms are experienced by up to 30% of passengers and 5% of drivers. Motion sickness in the car (or kinetosis) not only spoils the travel experience, but can also cause dangerous situations on the road. Many people mistakenly believe that the problem is associated only with a weak vestibular system, but in fact there are many more reasons - from vision characteristics to the technical condition of the car.

In this article we will look at 7 key reasons for motion sickness, including ones you didn't even know existed. You will find out why some people feel sick only in the back seat, while others feel sick even while driving, how the type of car suspension affects their well-being, and why modern crossovers feel sicker more than older sedans. And also - 10 proven methods, how to prevent an attack of nausea, from simple exercises to unexpected life hacks with interior ventilation.

If you think that motion sickness is a “children’s” problem, then you are mistaken. Research University of Pittsburgh show that Peak sensitivity to kinetosis occurs between 2 and 12 years of age, but in 20% of adults, symptoms persist for life. Moreover, with the development of self-driving cars, the problem may worsen: when the passenger does not control the movement, the brain receives even more conflicting signals.

We won't advise "just don't look at your phone" - instead you'll get specific recommendations, based on the physiology and technical characteristics of cars. For example, did you know that the correct setting ESP (Electronic Stability Program) can reduce motion sickness by 40%? Or that the smell of a new interior increases nausea due to the release of volatile organic compounds?

1. Signal conflict: why the brain gets confused in the car

The main reason for motion sickness is sensory conflict in the functioning of the vestibular apparatus, vision and proprioception (sense of body position). When you drive in a car, your eyes see a static picture (the interior, the phone screen), but your inner ear records acceleration and vibrations. The brain perceives this as a sign of poisoning and triggers a defensive reaction - nausea.

I wonder what drivers get motion sickness less often than passengers precisely because their brain “knows” in advance what movements will occur (turning, braking). But the passenger in the back seat, especially if he is reading a book or looking at his phone, receives the most conflicting signals. That's why Children get motion sickness more often than adults — their brain has not yet learned to filter unnecessary information.

• 🧠 Vestibular apparatus: Reacts to acceleration and changes in head position. In a car, it detects constant micro-vibrations, even if you are driving on a flat road.
• 👁️ Vision: if you look at close objects (phone, book), the eyes do not see movement, which increases the conflict.
• 🦵 Proprioception: muscles and joints feel the vibration of the seat, but cannot compare it with the visual picture.

Research NASA showed that people with a more developed vestibular system (for example, pilots or gymnasts) are less likely to suffer from motion sickness, but they react more sharply to the discrepancy between expected and actual movement. For example, if you expect smooth acceleration, but the car jerks sharply due to slipping, the risk of nausea increases 3 times.

⚠️ Attention: If you have recently suffered a traumatic brain injury or ear infection, motion sickness may be a symptom of an inner ear problem. In this case, you need to contact a neurologist, and not look for ways to “get used to it.”

2. Technical reasons: how the machine provokes nausea

Not all cars sway equally. For example, owners Mercedes-Benz S-Class with the system Magic Body Control complain of nausea less often than passengers Renault Duster with rigid suspension. The point is that suspension type, center of gravity and even body shape directly affect the intensity of motion sickness.

Here are the key technical factors:

Parameter	How does it affect motion sickness?	Examples of cars
Center of gravity height	The higher, the stronger the roll in turns → the greater the conflict of signals	UAZ Patriot (high) vs Toyota Corolla (low)
Suspension stiffness	A soft suspension smooths out vibrations, a hard suspension transmits all unevenness.	Volvo XC90 (soft) vs Ford Focus ST (sports)
Drive type	All-wheel drive distributes acceleration more evenly, reducing jerking	Subaru Outback (full) vs Lada Granta (front)
Body aerodynamics	Streamlined shapes reduce air turbulence → less sideways motion	Tesla Model S vs GAZelle Next

Another hidden provocateur - chassis malfunctions. For example, unbalanced wheels create vibrations at a frequency 10–20 Hz, which maximally irritates the vestibular apparatus. The same goes for worn shock absorbers or play in the steering.

How to check? Place the car on a lift and try to swing each wheel in a vertical plane. If the shock absorber does not dampen vibrations in 1-2 cycles, it is time to change it. Also note steering wheel beating at a speed of 80–100 km/h - this is a sure sign of wheel imbalance.

3. Psychological triggers: fear, stress and anticipation of nausea

If you have ever felt sick in a car, your brain has remembered this situation and will “expect” it to happen again. It's called conditioned reflex motion sickness — it’s enough to get into the car, and the body already begins to react: breathing quickens, cold sweat is released, salivation increases.

Psychological reasons also include:

• 😨 Fear of an accident: If the passenger is afraid of speed or driving style, his muscles tense, which increases the conflict of signals.
• 📱 Information overload: Trying to read or watch a video while moving increases brain load by 30%.
• 🚗 Negative past experiences: If you got motion sickness a lot as a child, you are at higher risk of it happening again as an adult.
• 🍺 Hangover or dehydration: Even mild alcohol poisoning reduces the brain's ability to process sensory signals.

Interesting fact: women get motion sickness more often than men not because of weakness of the vestibular apparatus, but because of a greater tendency to anxiety. Research Japan Motor Transport Society showed that if a passenger gets into a car with confidence that she will not get motion sickness, symptoms appear 40% less often.

4. Driving mistakes that make motion sickness worse

Even in a perfectly working car, you can provoke nausea by the wrong driving style. Here 5 most common mistakes:

1. Sudden acceleration and braking. Each tug causes the fluid in the inner ear to vibrate, irritating the vestibular system. It is especially dangerous to jerk the car in low gears.
2. Frequent lane changes. Every lane change is a micro-shock to balance. In traffic, it's better to drive smoothly, even if it's slower.
3. Zigzag movement. Some drivers avoid potholes on the road by swerving sharply between lanes. For passengers, it's like riding a roller coaster.
4. Ignoring cruise control. Constant micro-corrections of speed (even by 5–10 km/h) increase motion sickness. Turn it on on the highway cruise control or adaptive cruise.
5. Driving with a half-empty tank. The gasoline in the tank acts as an additional damper, smoothing out vibrations. If the fuel level is less than 1/4, the body begins to sway more.

If you are a driver and carry passengers prone to motion sickness, follow the rule "3P":

Pgreat acceleration, Ppredictable maneuvers Pconstant speed.

Smoothly press the gas and brake pedals|

Keep your distance to avoid sudden braking|

Use cruise control on the highway|

Drive around potholes in advance, without jerking |

Close the windows at speeds above 90 km/h (draft increases nausea) -->

5. Influence of the interior: odors, temperature and lighting

Even if the car drives perfectly smoothly, the wrong microclimate in the cabin can trigger an attack of nausea. Here's what's important to consider:

• 🌡️ Temperature: at +25°C and above, motion sickness intensifies due to stuffiness. Optimal range - 19–22°C.
• 💨 Ventilation: blowing cold air on your face reduces nausea by 50% (activates skin receptors, distracting the brain).
• 👃 Smells: new cars stand out formaldehyde and toluene, which irritate the mucous membranes. Use a carbon cabin filter.
• 🔦 Lighting: Bright sunlight shining into the eyes or flickering lights strains the eyesight.

One of the most unexpected provocateurs - interior fresheners. Synthetic fragrances (especially vanilla or citrus scents) may increase nausea. It is better to use neutral scents: mint, eucalyptus or lavender.

How to set climate control?

1. Set the temperature to 20–21°C.
2. Direct the air flow towards legs and arms, and not on the head.
3. Turn on recirculation mode if there is smog or dust outside.
4. Open the window 2-3 cm for fresh air (but avoid drafts!).

Why can't you turn on the air conditioner to maximum?

A sharp change in temperature (for example, from +30°C outside to +16°C in the cabin) causes spasm of the blood vessels in the brain. This not only increases motion sickness, but can also lead to headaches. The optimal difference is no more than 5–7°C.

6. Individual characteristics: why some people get motion sickness and others don’t

Genetics determines up to 70% tendency to motion sickness. If your parents suffered from kinetosis, there is a 60% chance that you will also experience nausea in transport. But there are other factors:

Factor	Effect on motion sickness	What to do
Age	Peak sensitivity is 2–12 years. After age 50, symptoms subside.	Children under 12 years old have seats in the middle of the cabin, adults - behind the wheel.
Gender	Women experience motion sickness 1.5 times more often due to hormonal fluctuations.	On critical days, take medications 30 minutes before the trip.
Weight	People with a BMI > 30 are less likely to suffer from motion sickness (more stabilizing mass).	Thin passengers should choose a seat with minimal motion (front seat).
Vision	People with astigmatism or farsightedness react more strongly to visual distortions.	Anti-glare glasses reduce eye strain.

Another little known fact: people with chronic ear diseases (otitis media, Meniere's disease) or migraines motion sickness 3 times more often. If nausea is accompanied by dizziness or ringing in the ears, this is a reason to consult an ENT specialist.

7. Emergency help: what to do if you are already feeling sick

If you feel the first symptoms (drooling, yawning, cold sweat), act quickly:

• 🚗 For the driver:
  • Pull over to the side of the road, open the window and take 5 deep breaths.
  • Drink 2-3 sips of cold water (not carbonated!).
  • Chew a piece of lemon or mint gum - this will distract the receptors.
• 👨‍👩‍👧‍👦 For the passenger:
  • Close your eyes and rest your head on the headrest (this reduces signal conflict).
  • Press your forehead against the cold glass - low temperature constricts blood vessels.
  • Concentrate your gaze on the horizon (not on the interior!).

What NOT to do:

⚠️ Attention: Do not drink carbonated drinks (they increase pressure on the stomach) and do not smoke (nicotine constricts blood vessels in the brain, impairing blood supply to the vestibular apparatus). Also avoid sudden head movements, as this may trigger vomiting.

If nausea turns into vomiting, after the attack, rinse your mouth with water and take Motilium or Cerucal (according to instructions). Do not eat for 1-2 hours, but drink in small sips.

FAQ: Answers to frequently asked questions

Is it possible to “train” yourself not to get motion sickness?

Yes, the vestibular apparatus can be trained. Start with short trips (10-15 minutes) and gradually increase the time. Exercises also help:

• Rotate your head clockwise/counterclockwise (10 times).
• Riding on a swing or carousel (1-2 times a week).
• Yoga classes (downward-facing dog and tree pose).

The effect will be noticeable after 2-3 months of regular training.

Is it true that motion sickness is worse in the back seat?

Yes, because:

• The passenger does not see the road ahead (the eyes do not register movement).
• The rear suspension is usually stiffer than the front (more vibrations).
• There is less fresh air in the cabin (air flows are delayed at the front).

The exception is vehicles with independent multi-link suspension (for example, Audi A8), where the difference between the front and rear seats is minimal.

What medications help with motion sickness?

Effective medications (take 30–60 minutes before travel):

Drug	Action	Side effects
Dramamine	Blocks H1 receptors in the inner ear	Drowsiness, dry mouth
Avia-More	Homeopathic, reduces nausea	Individual intolerance
Bonin	Long-lasting action (up to 24 hours)	Headache (rare)

Best for children to use motion sickness patches (for example, Travel-Dream), which are attached behind the ear and act through the skin.

Do bracelets help against motion sickness?

Bracelets with an acupressure ball (for example, Sea-Band) work on the principle of pressing on point P6 (on the inside of the wrist). The effectiveness is about 50%, but they are safe and suitable for pregnant women.

How to wear it correctly:

1. Find point P6 (3 fingers below the carpal crease).
2. Put on the bracelet so that the ball presses on this point.
3. Wear on both hands 30 minutes before travel.

Can motion sickness be a symptom of illness?

Yes, if:

• Nausea is accompanied dizziness when changing position (possible benign paroxysmal positional vertigo).
• Symptoms appear even on short trips (maybe neuritis of the vestibular nerve).
• Motion sickness began to appear in adulthood for no obvious reason (check condition of cerebral vessels).

In these cases, you need to contact a neurologist or otolaryngologist.