SYMPTOM
It's that dull or throbbing head pain that crops up when you try to read or use your phone in a car. This is usually down to your brain getting mixed signals from your eyes and inner ear as the vehicle moves, plus the strain of focusing on a static object in a dynamic environment.
For general awareness only. This is not medical advice. If symptoms are severe or persistent, consult a healthcare professional.
Showing 8 causes
Vestibular-visual sensory conflict
Your inner ear feels the car's sway, but your eyes see a still book. This sensory conflict confuses your brain, which leads to motion sickness symptoms like headaches.
Ocular muscle fatigue
Your eye muscles work extra hard to focus on the book, especially with the car's movement. This strain could lead to aching eyes and a dull headache.
Poor cabin lighting
Reading in dim or flickering light strains your eyes more than usual. Your brain may react to this visual stress with a headache.
Neck and shoulder tension
Reading in a car could force you into awkward postures, which leads to muscle tightness. This tension could radiate to your head and cause a headache.
Dehydration
Not drinking enough water during your trip could lower blood volume and affect blood flow to the brain. This often causes a headache, especially when concentrating.
Poor cabin air quality
Stuffiness, fumes, or strong smells in the car could irritate your senses. This could trigger headaches in sensitive individuals.
Photophobia sensitivity
If you're sensitive to light, the fluctuating light conditions in a car, combined with reading, could be overwhelming. This may lead to a headache.
Undiagnosed refractive error
Subtle vision problems like astigmatism could become apparent when you strain your eyes to read. The extra effort may trigger a headache.