You have not mentioned the age of your daughter.
It looks like a virus.
Just take care of her fluid and food intake and see if her activity is okay.
If the rash
is itchy- you may give her Benadryl
in doses appropriate for her weight.
How ever if her activity is low, intake is poor, she develops high grade fever
or you see any bleeding tendencies- do not hesitate to visit your doctor.
Hope my answer helps you.
Wish your daughter a speedy recovery.