Itchy eyes: common allergy triggers
Itchy eyes every May, or only at your friend's flat with the cat? The pattern is a clue, but it rarely names the culprit on its own. Our test measures IgE sensitisation to 300 allergens and allergen components, so you can see which ones your immune system reacts to instead of guessing.
Why allergies go for the eyes
Your eyes sit open to the air all day. Pollen grains, cat dander and dust mite particles land on the surface, and in people who are sensitised, IgE antibodies on immune cells in the eye lining react to them. That reaction releases histamine, which is what makes eyes itch, water and go red.
Doctors call this allergic conjunctivitis. It usually affects both eyes and often comes with sneezing or a runny nose. Itch is the giveaway: infections tend to sting or produce sticky discharge, allergies tend to itch.
Timing tells you where to look
When your eyes itch narrows the list. It does not settle it, because many people react to more than one thing.
- February to April in central Europe: hazel, alder and birch pollen.
- May to July: grass pollen, the most common seasonal trigger in Europe.
- Late summer: mugwort and, in some regions, ragweed.
- All year, worse in bed or in winter: house dust mite.
- Around animals, or in homes where animals live: cat, dog, horse.
- Damp rooms, compost or autumn leaves: mould spores such as Alternaria.
What the test shows
A finger-prick sample is checked for IgE antibodies to 300 allergens and allergen components, including the main pollens, animals, mites and moulds above. Your lab report shows how much IgE was measured for each one, with a class from Negative to Very high.
A sensitisation is not the same as an allergy. Some people carry IgE to grass pollen and never notice it. The useful part is matching the result to your own timing: a strong grass result plus itchy eyes every June is a pattern worth taking to your doctor.
Things that look like allergy but are not
Dry eye, screen strain, contact lens irritation, smoke and chlorine can all make eyes itch or burn. So can blepharitis, an inflammation of the eyelid margins. None of these involve IgE, so an allergy test will not pick them up. If little or nothing comes back raised and your eyes still bother you, that is useful information too, and an optician or doctor is the next stop.
When to see a doctor first
See a doctor or eye specialist promptly if you have eye pain, blurred or reduced vision, sensitivity to light, thick yellow or green discharge, symptoms in one eye only, or an eye injury. These are not typical allergy signs and need checking in person, not a blood test.
300 allergens. One test.
A finger-prick sample at home, sent by post. A detailed lab report typically 5 days after the lab receives your sample, and our plain-English guide to reading it. €300, €1 per allergen.
Questions
Can itchy eyes be the only allergy symptom?
Yes. Some people only notice their eyes, especially with pollen. Most also get some sneezing or a runny nose, but it varies. The test looks at IgE sensitisation regardless of which symptoms you have.
Should I test during or outside pollen season?
IgE antibodies to pollen are usually detectable all year, so you do not need to wait for symptoms. Many people test before the season starts so they know what to watch for.
My eyes itch at home all year. Is that pollen?
Year-round itch at home points more often to house dust mite, pets or mould than to pollen. The test checks all of these, so your results can show which group your blood reacts to.
Does a positive result mean the allergen causes my itchy eyes?
Not on its own. A result shows sensitisation, meaning IgE antibodies are present. Whether that allergen causes your symptoms depends on exposure and timing. A doctor can put the two together.