Motion sickness (travel sickness) is the unwell feeling — nausea, dizziness, cold sweats — brought on by movement during travel. It happens because of a sensory mismatch: the balance organs of the inner ear sense motion while the eyes may sense something still, such as a book or a cabin, and the brain becomes confused. It is a normal response rather than a disease, usually settles once the motion stops, and can be reduced with simple behavioural measures and, if needed, medication.
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In a medical emergency, or for severe or sudden symptoms such as breathing difficulty, chest pain, fainting or stroke signs, call 995 immediately.
Motion sickness is rarely dangerous, but dizziness or spinning that persists when you are not travelling, or comes with neurological symptoms such as severe headache, hearing loss, double vision or weakness, is not ordinary travel sickness and needs a doctor.
Why it happens
The classic trigger is reading or looking at a phone in a moving car: the eyes tell the brain “still” while the inner ear says “moving.” When these signals disagree, the brain triggers nausea, dizziness and the other symptoms. It is a physiological response to conflicting motion information, not a sign of anything wrong with the body.
Who is at risk and what triggers it
Almost anyone can get it with a strong enough stimulus, but children, pregnant women, people who get migraines and those with a past history are more prone. Triggers include car travel (especially winding roads and back seats), boats and ferries in rough seas, planes in turbulence, and even fairground rides or VR headsets. Aggravating factors include reading or looking at screens while moving, not being able to see the horizon, stuffy air and strong smells, heavy or greasy meals, alcohol, and anxiety.
Symptoms
Typical symptoms are nausea and sometimes vomiting, dizziness, cold sweats, looking pale, increased saliva, headache, and feeling generally unwell or drowsy, sometimes with rapid, shallow breathing. They usually build during travel and ease once the motion stops. The main practical risk is dehydration from repeated vomiting.
Red flags
Ordinary motion sickness is not dangerous and resolves when movement stops. Seek medical review, though, if dizziness, spinning or balance problems persist when you are not travelling or after the journey ends; if there are neurological symptoms such as a severe or unusual headache, hearing loss, ringing in the ears, double or blurred vision, slurred speech, weakness, numbness, fainting or confusion; or if vomiting is severe with signs of dehydration. “Motion sickness” that is new, severe or worsening without an obvious travel cause needs a doctor to rule out an inner-ear or other condition. Within Singapore, call 995 for a genuine emergency such as sudden neurological symptoms.
Behavioural measures
Non-drug measures are the first line and low-risk. Look at the horizon or a fixed point ahead and keep your eyes on the outside world, and avoid reading, screens and close-up focus while moving. Choose the calmest seat — the front of a car, over the wing on a plane, or mid-ship on a boat — facing forward, and get fresh air and good ventilation while avoiding smoke and strong smells. Keep your head still and supported, recline or close your eyes and sleep if you can, eat light before and during travel, avoid excess alcohol, sip fluids, and break long journeys with stops.
Medicines and other options
Medicines work best taken before travel starts, not once vomiting has begun, and a pharmacist can advise. Antihistamines such as cinnarizine or dimenhydrinate are commonly used and can cause drowsiness, and hyoscine (scopolamine), as tablets or a skin patch, is often the most effective single agent but has anticholinergic side effects such as dry mouth and blurred vision — suitability, and use in children or pregnancy, should be checked with a clinician, and this guide gives no doses. Ginger and acupressure wristbands at the P6 point are popular and low-risk, but the evidence for them is limited and mixed, so they are best seen as optional adjuncts rather than a sole plan for a long or rough journey. Over time, repeated graded exposure to the triggering motion can reduce susceptibility.
Helping children with travel sickness
Children are especially prone to motion sickness, but a few measures help a lot. Seat a child where they can see out of the front window rather than looking down at a book, tablet or toy, and encourage them to look at the horizon; take regular breaks on long car journeys to get fresh air. Keep the car cool and well ventilated, avoid strong smells, and offer a light snack rather than travelling on a very full or empty stomach. Distraction — music, chatting, or games that involve looking outside — can help, and some children do better napping through a journey. Medicines are available for children, but suitability and the right product depend on age, so check with a pharmacist or doctor rather than using an adult remedy, and give any preventive medicine before the journey starts. If a child vomits repeatedly and cannot keep fluids down, watch for dehydration and seek advice.
When to see a doctor
See a doctor if prevention measures and medicines are not controlling symptoms, if dizziness or vertigo persists after the journey or occurs without travel, if there are neurological red flags or hearing changes, or before travel if you need advice for children, pregnancy or existing conditions. If jet lag is also a problem on long flights, our separate guide covers that.
Related travel-health topics
- Pre-travel health advice
- Travel vaccinations
- Travellers’ diarrhoea
- Food & water safety abroad
- Altitude sickness
- Travel-related DVT
- Rabies
- Japanese encephalitis
- Insect bite prevention
- Travelling with medication
- Malaria prevention
- Travel clinics in Singapore
Sources
- HealthHub (Singapore) — Motion Sickness: healthhub.sg
- NHS — Motion sickness: nhs.uk
- CDC Yellow Book — Motion Sickness: cdc.gov
- Patient.info — Motion Sickness: patient.info
