Can anyone help? (Pics attached)

[Ginlinessisnexttogodliness]

My nineteen month old has come out in these spots
His older siblings have had chicken pox before he was born I am at but flummoxed by these
He’s scratching them but they don’t look blistered more like little pimples.
Any ideas?

I'd have said chickenpox given they are fluid filled, and itchy.

The ones on his torso look like insect bites/nettle rash.

The second photo looks like the rash is indented rather than raised - no idea!

The doctor thought he had it two weeks ago but turned out to be a heat rash. I wonder whether they are chicken pox
Feel like an idiot. You’d think after three babies I would know what this might be!

Ah, we did go for a wooded riverside walk thing the other day wonder if it’s that?

Yes @Seelinesime some of them are indented I am baffled
He had no temp is eating like a horse and playing happily still

Don’t know what happened to your name there sorry @Seeline

A nettle rash would have gone away after a few hours, although I agree that does look more like a contact rash to me. The indented ones baffle me too!