hay fever triggered by outdoor allergens, typically causing symptoms (such as runny nose, sneezing, itchy, watery eyes, etc.) between early spring to autumn when trees, grasses and weeds are producing pollen.
hay fever triggered by outdoor allergens, typically causing symptoms (such as runny nose, sneezing, itchy, watery eyes, etc.) between early spring to autumn when trees, grasses and weeds are producing pollen.