Once you get sensitized, it gets worse every year, right?
Since my teenage years I was mildly allergic to pollen, and now in my adulthood it seems to be getting progressively worse. Each spring is worse than the previous one, and the antihistamines do less effect (or so I subjectively feel).
I've had seasonal allergies for decades and haven't seen them trend more intense, though some years have more allergens than others.
Personally I only take allergy medication maybe 50-100 days a year, and usually just a half dose. I have definitely heard from people with worse symptoms that they get a tolerance to medications so it may help to switch between them if you take them year round.
That is the general pattern but not always. I never used to have allergies and then developed them a few years ago. Was very miserable for a couple months every year for about 5 years but they disappeared again a couple years ago. I tried a few things like taking a spoonful of local honey every day etc. Ultimately I don't know what made the difference sadly but I haven't been bothered by seasonal allergies for several years now.
Not _necessarily_. I had big problems with pollen when I was a kid, but very rarely, these days (there seems to be _something_ that causes me difficulty for a few weeks a year, but that's more or less it now).
Yes I think the occasional attacks of pollen get worse, but in the long term I'm more used to it and I've learned habits to alleviate.
For example taking the right kind of antihistamines, taking them in the evening before bed, and most important regular cleaning.