A wide array of substances can pose the risk of becoming respiratory allergens. It would be hard to discover the specific allergen that produces one's symptoms. Common cursors for seasonal allergies are fungus or mold and pollen.
Pollen
Pollen grains are common causes triggering seasonal allergic episodes. Pollen from ragweed is the more usual allergens responsible for almost 3/4 (or 75%) of such allergy cases. However, pollen from any grass or tree can trigger allergic symptoms. Pollen sources and counts in each area change with location, general weather conditions, and the kind of plants present. For example, in Northern America, pollen allergies generally follow this schedule of early to mid-spring for tree pollen; somewhere late in spring towards early on in summer, grass pollen abound; while the season for weed pollen falls around autumn.
Molds
Small bits of molds and their spores bear allergens that are hard to avoid since they are present anywhere. Most molds grow on decomposing plant matter but may also be present on living plants. Reaping ones harvests and disturbing the soil releases molds. Varieties of molds free spores whether the air is dry or has moist.
Common seasonal allergy symptoms include:
-Bouts of sneezing
-Itchy nose
-Watery eyes
-Itchy palate and throat
-Nasal congestion
-Runny nose
-Ear popping and fullness
-Sensations of pressure on cheeks and forehead
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