Core Viewpoint - The article discusses the increasing prevalence and severity of pollen allergies in northern China during the autumn season, highlighting the differences between autumn and spring allergies, and providing recommendations for prevention and management. Group 1: Autumn Pollen Allergies - Autumn pollen is more allergenic compared to spring pollen, primarily due to the smaller and drier particles from weeds such as ragweed, which can trigger severe allergic reactions even in small amounts [2][4] - The autumn pollen season lasts for 3 to 4 months, making it a prolonged period of potential allergic reactions [2] Group 2: Contributing Factors - Increased mold growth during autumn due to moisture from morning dew and decaying vegetation can also lead to allergic reactions [3] - The dry climate and strong UV radiation in autumn can exacerbate skin conditions and indoor allergies due to dust mites and pet dander [4] Group 3: Prevention and Management - Outdoor protection strategies include avoiding high pollen times, such as windy days and midday hours, and wearing protective eyewear and masks [5][6] - Indoor air purification and humidity control are recommended, including using HEPA filters and maintaining humidity below 50% [8][9] - Medication should be started a week before the pollen season, with common treatments including nasal sprays and oral antihistamines [11][12]

Group 1 - The article highlights that summer is also a peak season for allergies, contrary to the common belief that spring is the highest season for allergies [1] - It discusses the concept of photosensitivity, where certain foods and medications can exacerbate UV allergies, particularly in individuals with fair skin and a family history of such allergies [2][3] - Key preventive measures against UV allergies include avoiding sun exposure during peak hours, using broad-spectrum sunscreen, and checking medication labels for photosensitivity warnings [4] Group 2 - The article emphasizes the rise of mold allergies during the rainy season, particularly affecting children, who may be misdiagnosed with colds [5] - It notes that mold thrives in humidity levels of 60%-80%, which can significantly increase during the rainy season, leading to higher concentrations in home environments [5] - The article clarifies misconceptions about allergies, stating that they are not a sign of low immunity but rather an overreaction to harmless substances [6] Group 3 - It mentions that while some children may experience a reduction in allergy symptoms as they age, this does not guarantee complete resolution of allergies [7] - The progression of allergies in children is described as a "four-part series," starting from eczema in infancy to asthma in adolescence [8] - Early intervention is crucial, as untreated allergies in children can worsen or affect other organs [9] Group 4 - The article warns that severe allergic reactions can be life-threatening, primarily caused by food and drug allergies, which can develop rapidly [11] - It discusses the importance of maintaining appropriate temperature and humidity levels to prevent allergies, noting that extremes in either can trigger allergic reactions [12]