Sniffles and other symptoms often mistaken for a winter virus such as Covid or flu could actually be caused by something else, according to a pharmacist. George Sandhu, deputy superintendent at Well Pharmacy, explained that pollen allergies are now extending into autumn as seasons stretch longer.He said: “Warmer temperatures are lengthening growing seasons, so pollen counts are higher than in past decades. Rising carbon dioxide levels don’t just warm the planet, they also act like a fertiliser for plants, increasing pollen production.”What Is a Pollen Allergy?A pollen allergy happens when your immune system reacts to pollen, which is a fine powder released by trees, grasses, and weeds during reproduction. In people with this allergy, the immune system mistakes pollen for a harmful substance and releases chemicals such as histamine. This can trigger symptoms like sneezing, runny or blocked nose, itchy or watery eyes, and throat irritation. This condition is commonly called hay fever and tends to appear during certain times of the year when specific plants are blooming, according to the Cleveland Clinic.Sandhu added that milder winters are allowing some plants to start producing pollen earlier in spring and continue later into autumn. He noted: “Late summer also sees a shift from weed pollen to increased indoor mould, leaf mould, and dust mites, which all peak during autumn. Combined with damp autumn conditions, people with allergies now face a much longer ‘high-risk window’ every year.”Types of Pollen AllergensThe pharmacist explained the three main types of allergens:Weed pollen: including ragweed, mugwort, plantain, nettle, dock, goosefoot, and sorrel.Mould spores: thrive in damp autumn conditions and can be found in rotting leaves, compost heaps, soil, as well as bathrooms, kitchens, and other damp areas.House dust mites: found in bedding, carpets, soft toys, and fabrics.Best Treatment for a Pollen AllergyThe best way to manage pollen allergies depends on how severe they are and what suits your body. What helps one person may not work for another. A healthcare provider can recommend the most effective treatment. According to Sandhu, “Antihistamines can relieve sneezing, runny nose, and itching, for example, cetirizine or loratadine. Nasal corticosteroid sprays, such as fluticasone or mometasone, reduce inflammation and congestion. Decongestants may give short-term relief for a blocked nose, but they shouldn’t be used long-term. Saline sprays or rinses can help clear allergens from the nose, and eye drops can soothe itchy, watery eyes.”Can Allergy Shots Work Against Pollen Allergy?Allergy shots gradually retrain your immune system to tolerate pollen. They involve a series of injections containing pollen, with the dose slowly increased over time. This helps your body build tolerance. Allergy shots are administered by a healthcare provider.While it is impossible to avoid pollen completely, you can change some daily habits to reduce exposure. For instance, try not to be outside on warm, windy spring days when pollen levels are high. Pollen counts are usually highest in the early morning and early afternoon.