Anyone ever seen something like this?

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Yesterday my 2.5yo had a fever (39 degrees). Today her fever had reduced, but she has some red bumps on her knee and shoulder. She said they “feel bad” but she doesn’t seem to be itchy or anything. Anyone have ideas of what this could be? Of course I’m not sure that the fever and bumps are related, could be a coincidence. (I sent pics to our GP but they always take ages to get back to us.)