If the person you dislike the most were to experience one slight inconvenience every day for the rest of their lives, what would you choose it to be?

Difficult to put down something that someone here won't have a kink for. 🙄
I was going to say incontinence, but nope there's a group for that.
Flatulence? Nope, group for that.
Really bad body odour? Almost certainly a group for that.
I know, let's make them always dribble when they talk and eat.

They emit a slight electromagnetic pulse. It doesn't affect their health or longevity but personal electronics don't work around them.

Crushing guilt for the way they treated my mom.

Misplaced keys so they are always on edge of being late.

He has a scar on his face that will be a constant reminder. That's ok for now.

Wet socks.

Being put to the back of the queue for everything.

A runny nose

That his sock would always slip down in his shoe no matter what he did it would always slip down

I would want her to have a headache everyday like I do.

A drop of water getting into their sleeves.

The ability to not get high of drugs.

Ants in their pants

A ringing in their ears

Inflamed hemorrhoidal tissue

Explosive diarrhea -- ideally during sex.

Hemorrhoids
Because
They deserve karmic justice