I think that the pollen in the air irritates your nose, which causes your body to make snot to try and flush it out. Hayfever is when your body thinks that the invading pollen is much worse than it really is and over-reacts by making too much snot and making your eyes water.
I don’t know if we’ll ever be able to premanently block it, but antihistamines are very effective at calming the body’s response down to manageable levels.
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sebadam commented on :
Thanks for the great answer! I understand now! And haha, yeah. It would be great. Only if it was normal to wear a gas-mask 🙂