Immune & Inflammation

IgE — Your Allergy Radar

If you've ever sneezed your way through spring or broken out in hives after eating something, you've met IgE. This antibody is your immune system's overenthusiastic bouncer. When it encounters an allergen, it triggers the release of histamine and other chemicals that cause all those wonderful allergy symptoms. Elevated IgE is a strong sign of atopy, allergic conditions and parasitic infections. Newer research is even exploring it as a cancer biomarker.

Why Test Immunoglobulin E?

This test is especially helpful if you're battling allergies, eczema, asthma or frequent allergic reactions to food or airborne triggers. It's also worth considering if you're dealing with recurring sinus infections, chronic diarrhoea, unexplained skin rashes or mystery fevers.

What Do High Immunoglobulin E Levels Mean?

Elevated IgE is a strong marker for allergies, atopic conditions and parasitic infections. Very high levels can be linked to serious allergic reactions (anaphylaxis). Common culprits behind high IgE include hay fever, eczema, asthma, food allergies and chronic sinus infections.

What Do Low Immunoglobulin E Levels Mean?

Low or undetectable IgE might mean the immune system isn't firing on all cylinders. Possible causes include certain medications, chronic diseases, autoimmune conditions, gut disorders and chronic infections. Interestingly, ultra-low IgE levels are being studied as a potential oncology biomarker.

Symptoms to Watch For

  • Hay fever (sneezing, runny nose, itchy eyes)
  • Eczema or inflamed, itchy skin
  • Asthma (wheezing, shortness of breath)
  • Food allergy reactions (hives, swelling, tummy trouble)
  • Chronic sinus infections

Who Should Get Tested?

  • People with known or suspected allergies
  • Anyone with eczema, asthma or other atopic conditions
  • Those with unexplained skin rashes or respiratory symptoms
  • Anyone being checked for parasitic infection
  • People tracking the effect of allergy treatment

How to Prepare for Your Test

No prep needed. Bring valid ID to your appointment.

Order Your Blood Test

Test your Immunoglobulin E levels with an accredited Swedish laboratory. Results within days, reviewed by Wellth.

Immunoglobulin E Antibodies →

Frequently Asked Questions

Does high IgE always mean I have an allergy?
Not necessarily. While elevated IgE and allergies go hand in hand, it can also be raised by parasitic infections, certain immune disorders and some cancers. Your doctor will look at the full picture — your symptoms, history and the number together.
Can IgE levels change over time?
They absolutely can. IgE fluctuates with allergen exposure, treatment, age and overall immune health. That's why tracking it over time gives you a much better picture than a single snapshot.
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Wellth Team

Wellth

Our content is written and reviewed by Wellth, and fact-checked against peer-reviewed research and current Swedish clinical guidelines.

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Medical Disclaimer

The information on this page is provided for informational purposes only and does not constitute professional medical advice, diagnosis, or treatment. Wellth provides health information and testing services but is not a substitute for clinical care. Always consult a qualified healthcare provider if you have questions about a medical condition. If you are experiencing severe or urgent symptoms, contact your doctor or call 1177 Vårdguiden. Blood test results should be interpreted by a qualified healthcare professional in the context of your complete medical history.