Can you be allergic to the smell of swimming pools?

[birdling]

Every week, when I take my children to their swimming lessons, I sit on the side and watch. Every week, despite feeling perfectly fine on the way in, I come out feeling like I've got awful hay fever/I'm coming down with something. This always lasts until I go to sleep. The next morning I'm fine again.
Does anyone else have this problem?

Not to the smell, but to the chemicals that cause it, which at a pool is usually chlorine, though there are other ways of keeping the water clean.

Meant to add - I don't have this problem, but my mother did at one point. They changed the chemicals some time later and she was okay again. But this was back jn the '90s.

Oh dear, this has only started happening in the last few months. Was fine before. If they've changed the chemicals recently, perhaps that would explain it.
I'll try taking an antihistamine before I go next time.
Thanks for your reply.

My asthma can flare up in the leisure centre , I don’t even need to be poolside to start feeling it.
i must be super sensitive to chlorine

Chlorine can make your eyes water so I'm sure it can give other hayfever like effects.

I used to get this. Dd swam at the same pool 3 times a week with a club. I was fine 2 of the days but on Thursdays I always got really allergic, as did another parent I sat with. It turned out they were cleaning the pool before the club that night and also cleaning the changing rooms whilst they were swimming