Any question answered...

My fingers got really cold this morning while on my motorbike (so probably some vibration too) and while they have mostly recovered, the tip of my left middle finger is still a bit numb.

Should I be worried?

Peak coldness was probably at around 8/815am this morning. I changed to warmer gloves but was out/riding till about 3pm.

No, eventually your fingers will drop off*, and then you'll die because you can't each chips out of the paper any more.

*This was supposed to be a joke, but I've checked and digit loss is a possibility with Vibration white finger

Sounds like VBF: do/have you worked with electric or pneumatic tools?

I'd get it checked out.

Allowed use has been reduced drastically in recent years: we only get to spend 20 mins per hour on a pneumatic breaker, total 3 hours a shift; electric breakers are even more restricted.

On the upside we get to drink more tea/read Nuts & Zoo/watch others work.