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Ash pollen

Ash (Fraxinus excelsior) está en el aire aquí desde april to may, pico late April into May, overlapping the birch peak almost exactly. Potencia alergénica: moderate. Sin reacción cruzada alimentaria establecida.

Esto es información de referencia, no un diagnóstico ni un plan de tratamiento. Un calendario de polen no puede decirle a qué es alérgico, y ninguna página puede declarar un alimento seguro para usted — solo la etiqueta del paquete en la mano y el clínico que conoce su historia. Cualquier cosa más allá de síntomas leves y de corta duración en boca o nariz — hinchazón que afecta la respiración o la deglución, urticaria lejos de la boca, sibilancias, vómito o desmayo — es una pregunta de emergencia, no de lectura.

● semanas pico · ○ habitualmente en el aire. Ventana continental típica de los programas nacionales de vigilancia aerobiológica de la región · comprobado2026-09-06

Dónde crece aquí

Common ash is a tall forest and parkland tree, most abundant in the western and southern parts of the region and in Denmark and southern Sweden. Its numbers have fallen sharply because of ash dieback, the fungal disease that has swept through European ash over the last two decades, which is slowly reducing how much ash pollen is in the air here.

Cuándo está en el aire

Ash flowers in late April and May, on top of the birch season. That overlap is why ash allergy is underdiagnosed in the north: the symptoms are attributed to birch, which is airborne in far greater quantity at the same time and is the obvious suspect.

Cómo se siente

Ordinary rhinoconjunctivitis, indistinguishable in the chair from birch. What separates them is a blood or skin test for the specific allergen, and in practice that test is only ordered when it will change something — for example, before starting immunotherapy aimed at the right tree.

Con qué reacciona de forma cruzada

Ash is in the olive family, and its major allergen belongs to the Ole e 1-like protein group. That means ash allergy cross-reacts with olive pollen — a serious allergen in southern Europe but not a factor here — and with privet and lilac. There is no established ash-to-food syndrome. A less obvious relative is ribwort plantain, whose major allergen is in the same protein family, which is one route to symptoms that continue past the tree season into the summer.

Pólenes relacionados:olive, privet and lilac — the olive family — and plantain.

Alimentos: sin reacción cruzada establecida. Es un negativo útil — una reacción alimentaria en alguien sensibilizado aashno lo explica el polen y merece su propia evaluación.

Moléculas alergénicas nombradas:Fra e 1 (an Ole e 1-like protein). Estos son los nombres oficiales WHO/IUIS, y es lo que informa un análisis de sangre de resolución de componentes.

Qué ayuda de verdad

If spring symptoms clearly start before birch and continue after it, ash is one of the reasonable explanations and is worth naming when you see a clinician. It also matters for anyone travelling south in spring: an ash-allergic northerner can have a bad time in an olive-growing region without ever having reacted to an olive tree at home.

Qué se lee mal

Ash is often assumed to be irrelevant this far north. It is not — it is simply hidden underneath birch. The other misreading runs the other way: eating olives has nothing to do with olive pollen allergy, and ash allergy is not a reason to avoid them.

Fuentes:Reglamento (UE) n.º 1169/2011, anexo II· Reglamento de ejecución (UE) n.º 828/2014 de la Comisión (declaraciones de gluten)· Nomenclatura de alérgenos WHO/IUIS· ventanas de temporada de los programas nacionales de vigilancia aerobiológica de Estonia, Finlandia, Suecia, Dinamarca y Noruega· patrones de reacción cruzada parafraseados de la literatura alérgica y material de EAACI· comprobado2026-09-06

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