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Electromagnetic Fields
Reviewed by Medicinsk Expert•Last updated: 2026-10-22•Poisoning Toxicology Environmental Health

Electromagnetic Fields

Electromagnetic fields (EMFs) are areas of energy surrounding electrical devices, and while research is ongoing, current evidence has not established a definitive link to human health problems.

Overview

Electric and magnetic fields (EMFs), also called radiation, are areas of energy that surround electrical devices. Everyday sources include:

  • Power lines
  • Electrical wiring
  • Microwave ovens
  • Computers
  • Cell phones

Research on Cancer Risks

There has been concern regarding EMF exposure and cancer. While some studies have suggested a link between EMF exposure and childhood leukemia, others have not. Furthermore, studies have not found proof that EMF exposure causes other childhood cancers or cancers in adults.

Cell Phone Safety

Cell phones emit radiofrequency energy (RF), a form of electromagnetic radiation. Scientific evidence has not yet found a link between cell phone use and health problems in humans, though scientists continue to conduct research. If you wish to limit your exposure, you can:

  • Reduce the amount of time spent using your cell phone.
  • Use speaker mode or a headset to increase the distance between your head and the device.

Frequently Asked Questions

nswer 2: To reduce exposure, you can increase your distance from electronic devices, as EMF intensity decreases significantly with distance. For example, avoid placing alarm clocks directly next to your head while sleeping. Unplug devices when not in use, especially in bedrooms. Consider using wired internet connections instead of Wi-Fi when possible, or turn off Wi-Fi routers at night.
nswer 1: Common household sources include microwave ovens, Wi-Fi routers, cordless phones, computers, and even electrical wiring in walls. While all emit EMFs, the intensity and proximity of exposure vary. For instance, standing very close to a microwave oven while it's operating will result in higher short-term exposure than sitting a few feet from a Wi-Fi router. However, current research has not definitively linked typical household EMF exposure to adverse health effects.
nswer 3: While a definitive link has not been established, some studies have explored potential associations between EMF exposure and conditions like childhood leukemia, though results have been inconsistent. Other reported, but unproven, symptoms in highly sensitive individuals (sometimes referred to as "electrosensitivity") include headaches, fatigue, dizziness, and sleep disturbances. It's important to discuss any persistent symptoms with your doctor.
Source: MedlinePlus, National Library of Medicine

MedlinePlus brings together authoritative health information from the National Library of Medicine (NLM), the National Institutes of Health (NIH), and other government agencies and health-related organizations.

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