Mystery rash

[Oysterbabe]

I noticed this rash on my 7 year old's right leg on Monday. The spots have now developed into blisters now. They are only on her right ankle / lower leg. She's not unwell in any way. She says they are a bit sore to touch but they aren't really troubling her. Any clues?!
We were camping at the weekend so maybe bites of some kind?

I bet it’s a plant if you’ve been camping. Giant hogweed causes blisters although all the images I’ve seen in the press from hogweed have been bigger.

Ah I hadn't thought about hogweed. Maybe it is a minor dose of that.

My son and I get blisters like that from mosquito bites. We just react badly. Keep an eye as sometimes I've needed antibiotics as they get infected.