It could be related to the fact that Spring is starting in the Northern Hemisphere, and thus, the body reacts to the increased amount of polen in the air.
I'm allergic, so it's normal for me to suffer those symptoms every Spring.
Yea, why are you just guessing random stuff? You can't smell when you are having allergies because your sinuses are full of snot and your nose is clogged, not because your smell receptors stop working.
It could be related to the fact that Spring is starting in the Northern Hemisphere, and thus, the body reacts to the increased amount of polen in the air.
I'm allergic, so it's normal for me to suffer those symptoms every Spring.