What are these spots?

[Bigredspots]

I've woken up today with these itchy, sore spots on my back. Google brings up too many pics of spiders so I thought I'd ask here!
No sign of bed bugs anywhere, plus none of us have been away anywhere.
I did spend yesterday in a fairly dusty kitchen/village hall.
Cam anyone help please? I feel fine otherwise.

Spots on the torso, especially if they’re in a line, can be an early warning sign of shingles. I can’t remember where I heard or read this, but remember that the advice was to get to pharmacist / GP and get some retroviral drugs to stop it taking hold.

I think @Bigredspots has left it too late for antivirals as most people do when it's shingles.

I don't think it's shingles. I feel fine and they're not in a line.

I think it was chicken pox. The big one has crusted over (sorry!) and the rest are fading. No new ones. Probably a mild case due to previously having it, albeit as a baby.

Thanks to all for your help.