Finger fire

I like the saying: See with your eyes, not your hands.
But I did not think about it when I saw this viper's bugloss / blueweed (Echium vulgare) and touched it. It was full of nasty tingling hair.
Ouch, it hurt.
I can understand the Swedish name: blue fire.
Fortunately, we were only a few hundred meters from our home, so I was able to wash my hands fairly quickly.