Pollen Count
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Olive Pollen Allergy

Olive pollen is the spring pollen of olive trees (Olea europaea) grown around the Mediterranean. Their small, yellow-green flowers release pollen into the air. At high counts it triggers nasal and eye symptoms and can worsen asthma in sensitized people.

Olive Pollen

This pollen can cause allergic reactions in some people. Olive pollen allergies can be quite bothersome, especially in areas where olive trees grow in large numbers.

Like alder pollen and birch trees, olive trees release pollen that can trigger seasonal allergies.

Many people who are allergic to pollen from these trees experience similar symptoms during allergy season.

Symptoms of an Olive Allergy

If you are allergic to olive pollen, you might notice symptoms like:

According to Thermo Fisher Scientific, exposure to olive pollen can trigger conjunctival and nasal symptoms in sensitized individuals. It may also exacerbate asthma in these patients, particularly when olive pollen counts are high.

Where is Olive Pollen Found?

Olive trees are commonly found in warm, Mediterranean climates. They grow in countries like Spain, Italy, Greece, Turkey, Tunisia, Morocco, and Portugal. Originally cultivated throughout the Mediterranean, olive trees are now spread over most subtropical regions of the world.

Olive pollen regularly reaches high levels in our forecasts for cities like Madrid, Rome, Athens, and Seville, where olive trees are everywhere.

Even though olive trees are mostly found in these warm areas, people in other parts of Europe might also be exposed to olive pollen if the trees are grown there.

When is Olive Pollen Season?

Olive pollen season usually starts in the spring and can last through the summer. In the Mediterranean, olive pollen is most common from mid-April to June. The pollination season for olive ranges from mid-April to the end of June.

However, the exact timing may depend on the weather and location. The pollen count tends to be highest during warm, dry, and windy days when the pollen is easily spread through the air.

Treating an Olive Pollen Allergy

There are several ways to manage an olive pollen allergy:

Understanding olive pollen and how it affects you can make dealing with allergies easier. Keeping track of pollen counts and using the right treatments can help you feel better during allergy season.

Cross-Reactivity and Oral Allergy Syndrome (OAS)

If you are allergic to olive pollen, you may also experience itching, tingling, or mild swelling in your mouth, lips, or throat after eating certain fresh fruits, vegetables, or nuts. This is known as Oral Allergy Syndrome (OAS) or Pollen Food Allergy Syndrome (PFAS).

It happens because your immune system mistakes proteins in some foods for olive pollen proteins. The New Zealand Allergy Society notes that other pollen allergies associated with OAS include grass and olive trees.

Common trigger foods for people with olive pollen allergy include:

According to Fisher Clinical Services, it is quite common, with up to 25 percent of children with allergic rhinitis also suffering from OAS. Common plant foods and materials involved in OAS for olive tree include latex and fruits such as peach, pear, melon, kiwi, banana, and pineapple.

Cooking or peeling these foods can often reduce or prevent the reaction. However, if you experience symptoms with nuts, it is best to consult an allergist.

Olive Pollen FAQ

What are olive pollen allergy symptoms?

Typical symptoms are sneezing, a runny or stuffy nose, itchy or watery eyes, and an itchy throat. Severe cases bring wheezing, trouble breathing, and fatigue. Symptoms track the spring season in olive growing regions.

When is olive pollen season?

In the Mediterranean, olive pollen is most common from mid April to the end of June. Exact timing shifts with weather and location, and counts peak on warm, dry, windy days that spread pollen through the air.

Is olive pollen allergy the same as olive oil allergy?

No. Olive pollen allergy is an airborne spring reaction to tree pollen, while olive oil reactions involve different proteins and are a separate, uncommon food issue. Pollen allergic people may still get mouth itching from peach, pear, melon, kiwi, or nuts. Symptoms with nuts deserve an allergist visit.

How can I reduce olive pollen symptoms?

Stay indoors on high pollen days, especially in windy mornings, with windows and doors closed. A HEPA air purifier helps indoors, and showering plus changing clothes after outdoor time removes pollen. Ask your doctor about medication or immunotherapy.

Last reviewed: October 2026.

Check Pollen Levels for Olive Pollen

See the current olive pollen levels across Europe on our Pollen Map (select "olive" on the map options).

You can also sign up for pollen alerts to be notified of high olive pollen days in your city.

Track olive on iPhone with our free pollen count app.

Pollen guides are for education and planning only. This is not medical advice. Consult a qualified healthcare provider about symptoms or treatment.

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