Winter Allergies Surge: Causes & Information (March 2026)

by Grace Chen

Across Spain, a surge in allergy symptoms is being reported earlier than usual this year, leaving many grappling with discomfort typically associated with spring. The combination of factors – including pollution, wind and increased pollen levels due to recent rainfall – is creating what experts describe as an “explosive cocktail” for allergy sufferers. This early onset and intensity are prompting concerns and a call for proactive management of symptoms.

The increase in allergy cases is particularly noticeable among those sensitive to cypress pollen, known as cupresáceas. Levels of this pollen are reportedly “disparaged” – significantly higher – across much of the country, according to reports from March 1, 2026. Symptoms such as sneezing, watery eyes, and nasal congestion are common, and can often be mistaken for a common cold or flu, making accurate diagnosis crucial.

Understanding the Rise in Winter Allergies

Traditionally, allergy season begins later in the year, but recent weather patterns have disrupted this cycle. As reported by Antena 3, the combination of storms and rising temperatures has triggered an abrupt and substantial release of cypress pollen. In Jaén, pollen levels have reached 1,232 grains per cubic meter, exceeding the reactive level of 135 by a factor of eight. Catalonia is also experiencing a particularly severe situation, with Barcelona at the forefront of the surge. Antena 3 reports that the pollen count has “risen sharply,” indicating a sudden and significant increase.

Dr. Pilar Lara, from the Allergology Service at the Virgen Macarena University Hospital, explained that the rapid shift from zero pollen grains to levels exceeding reactive thresholds is a key factor driving the current outbreak. This unusual pattern is expected to continue, with pollen from plane trees and olive trees anticipated to follow as the months progress, potentially leading to a challenging spring season for allergy sufferers.

Symptoms and Potential Complications

The symptoms of seasonal allergies can mimic those of a cold, making self-diagnosis difficult. Common indicators include sneezing, runny nose, itchy eyes, and congestion. Still, allergies can also exacerbate existing conditions, such as asthma. According to RTVE, approximately 40% of individuals with allergies may eventually develop asthma, highlighting the importance of seeking professional medical advice.

Experts strongly advise against self-medicating and recommend consulting a family doctor or allergist when symptoms appear. Early diagnosis and appropriate treatment can help manage symptoms effectively and prevent potential complications. Differentiating between an allergic reaction and a common cold is crucial for receiving the correct medical care.

Preventative Measures and Long-Term Strategies

Beyond medical intervention, several preventative measures can help minimize exposure to allergens. These include using preventative “barrier” methods such as wearing glasses and masks, particularly outdoors. Avoiding outdoor activities during peak pollen times and ventilating homes strategically – opting for controlled ventilation rather than open windows – can also reduce exposure. For individuals with asthma, maintaining lower humidity levels in the home, potentially with the use of dehumidifiers, is recommended.

Vaccination remains a key long-term strategy for managing allergies. However, in the immediate term, proactive steps to reduce exposure and seek medical guidance are essential. The current situation underscores the growing impact of environmental factors on public health and the need for continued monitoring and research.

As the spring season approaches, experts anticipate continued challenges for allergy sufferers. Staying informed about pollen levels and following recommended preventative measures will be crucial for managing symptoms and maintaining well-being. The Virgen Macarena Hospital offers skin allergy testing to help identify specific allergens and tailor treatment plans.

A skin allergy test being conducted at the Virgen Macarena Hospital, as shown in a report from RTVE. (HOSPITAL VIRGEN MACARENA/EUROPA PRESS)

The situation is evolving, and ongoing monitoring of pollen levels is essential. Individuals can stay updated through local health authorities and weather reports. The current surge in allergies serves as a reminder of the complex interplay between environmental factors and human health, and the importance of proactive management of allergic conditions.

Disclaimer: This article provides general information about allergies and should not be considered medical advice. Always consult with a qualified healthcare professional for diagnosis and treatment of any health condition.

What steps are you taking to manage your allergies this season? Share your experiences and tips in the comments below. And please, share this article with anyone who might find it helpful.

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