Chilli has been stung a couple of times. First time was last year, she was chasing a wasp, next thing we knew she had screamed into the house done a full circuit through every room and came screaming back out again. Think she was trying to run away from the sting. Then she licked her leg like mad for a bit so that's where the sting was. She felt very sorry for herself for the rest of the day, just went to bed, I checked her regularly, no swelling, just a grumpy cat.
Second time was a couple of months ago. A bumble bee had found its way into my flat and Chilli spotted it so again picked a fight. Well I thought they only had one sting but apparently not, it got her paw so she flicked it off, it then attached itself to her side and apparently continued stinging as she was going mental trying to get it off, I couldn't get near to help! Again, no swelling or any other symptons.
I'm hoping that's the last time she plays with the stingy things. Dave has yet to encounter them.