I get them. I have a pretty severe reaction to grass pollen, nothing else bothers me though. When I used to have a lawn to mow I wouldn't be able to function for a couple hours afterwards, even with my medication. I'd go inside and lay in front of a air purifier.
Luckily for now, somebody else does the mowing. This year was actually a great year for me. I haven't even had to take my medication past June as the grass was dead most of the summer.