People should take symptoms like running nose, sneezing, watery eyes, itchy nose or throat, etc because they might be signs of an allergic reaction.
An allergic reaction is a result of the immune system identifies a benign item (like dust, pollen, or dander) as harmful.
An allergic reaction develops within a few minutes of being exposed and might appear instantly or after some time.
The runny nose is also known as allergic rhinitis, is the result of dust, pollen, or even spores in the air.
Similarly, continuous sneezing is the result of allergens which create irritation in the nose.