The itch won’t inhibit my eating, drinking, speaking etc, so that one.
I’d go with the itch. In the 1 out of 1 cases I know of where someone had chronic hiccups, they ended up going to jail for murder.
The itch would bother me more, but the hiccups would bother other people more. I’m not sure which I would choose.
Suicide will be easier with just an itch.
Edit: Wait, no! We have euthanasia here. Hiccups so I can get medical sign-off.