Thank you for the input.
Hand foot mouth disease is a possibility here.
It is caused by virus.
There can be blister formation on hands, toes, feet.
Though initially there can be fever before rash & there are usually rash inside mouth but there can be some variation.
Rash can be present in other parts of body.
Though she does not have itching, an allergy
can be there too as the symptoms are not typical.
I would advise to get an examination by doctor.
Viral infection usually subsides on its own.
Please ensure enough liquid to keep adequate hydration.
I hope this information will be helpful.
If you have any query, please feel free to ask.
Wish her healthy life.