My father briefly worked in the U.K. in the 80’s and claims that British nurses would say ‘you’ll feel a small prick’ just as they were about to insert the needle.
I’m not sure if it’s true but it has always made me chuckle.
Totally true. They now replaced it with “sharp scratch”, quite a good description but lacks oomph for sure.
It's not uncommon in the US either. Jab, poke, and stab are all used as euphemisms for an injection in my experience.
To me it’s a synonym to shot or injection. It doesn’t seem particularly a Britishism. Perhaps they don’t use shot as much?