Short Answer
Some people notice headaches that seem to coincide with time spent near computers, phones, or other electronic devices. There are several well-understood reasons this can happen, and some less understood ones that researchers continue to investigate.
Well-Understood Contributors
Eye strain
Screens require sustained, close-focus attention. The muscles that control focusing can fatigue over time, contributing to headaches around the eyes and temples.
Screen glare and brightness
High-contrast displays, uncalibrated brightness, and glare from overhead lighting all place additional demand on the visual system. If you’ve also noticed warmth or flushing near your screen, brightness is worth checking first.
Blue light
Screens emit a relatively high proportion of blue-wavelength light. Some people report improvement after using filtering glasses or reducing screen brightness.
Posture and tension
Many people sit in subtly poor positions for hours without noticing. Tension in the neck, shoulders, and upper back can refer pain to the head. A brief nervous system reset — movement, breathing, a short walk — can help release some of that built-up tension.
Dehydration
Focused device use is associated with forgetting to drink water. Dehydration is a well-known headache trigger.
Less Understood Factors — see what the research shows
Some individuals describe sensations — pressure, tightness, or discomfort — that appear specifically in the presence of wireless devices, and that reduce when those devices are removed or switched off. Whether this reflects a direct response to electromagnetic fields or another mechanism is a question researchers continue to investigate.
How to Investigate the Pattern
Track the pattern first — use this guide
Spend one week noting when headaches occur, what you were doing beforehand, which devices were in use, and whether the headache improved after any specific change.
Address the obvious candidates first
- Adjust screen brightness and position
- Check your seating posture
- Try the 20-20-20 rule
- Drink more water during screen time
- Take regular breaks
When to See a Doctor
Persistent headaches, particularly new patterns or headaches that are severe or worsening, are worth discussing with a doctor.
Frequently Asked Questions
Some people report headaches they associate with routers or other wireless devices, though a direct causal link is difficult to establish. See Is My Router Making Me Sick? for a closer look at that question.
Eye strain and posture fixes often help within a day or two. Anything related to a broader environmental pattern may take a week or more of consistent observation to confirm.
It’s common enough to be worth investigating, but not something to treat as normal or ignore indefinitely. Start with the well-understood contributors above before assuming a more unusual cause.
From The Signal
- Common Patterns People Notice in Tech-Heavy Environments
- How to Track Patterns in Your Environment
- EMF Sensitivity: What the Research Actually Shows
- Is My Router Making Me Sick?
- Why Is My Face Hot When I Use My Laptop?
- Spring Reset: 5 Ways to Recalibrate Your Nervous System
- Take the Environmental Sensitivity Quiz