What Are the Common Triggers for Seasonal Allergies?
Seasonal allergies, also known as hay fever or allergic rhinitis, are often triggered by airborne allergens that vary throughout the year. The most common triggers include pollen from trees, grasses, and weeds. During spring, tree pollen, such as from birch, oak, and cedar trees, is prevalent. In the summer, grass pollen becomes a significant allergen, with types such as Bermuda and Timothy grass being common culprits. During the fall, ragweed pollen is the primary trigger, and its pollen can travel long distances. In addition to pollen, mold spores from outdoor fungi can also trigger seasonal allergies, especially in humid environments or areas with a lot of fallen leaves. Dust mites and pet dander can also contribute to allergic reactions during certain seasons, particularly in areas where people spend more time indoors, like during the winter months. Seasonal changes in temperature and humidity can increase the presence of allergens in the air, as warmer temperatures promote plant pollination, while rain can lead to an increase in mold growth. Additionally, pollution and environmental changes, such as climate change, have been found to contribute to the severity of allergy seasons by extending the duration of pollen dispersal or increasing pollen levels in certain areas.
