Hello and welcome to HCM
From your description, it does seem like a
viral fever with rashes, most probably hand,foot and mouth disease. The spots may increase and then decrease over the next few days with fever and decrease in a week.
Was there any contact with other infected kids?
She will need rest and fluids and mainly symptomatic treatment.
Paracetamol in case she develops fever or pain. Throat gargles.
Apply calamine+menthol lotion 2-3 times a day on the rashes for soothing.
Cortisone cream maybe applied if severe.
You can also use an antihistamine like
fexofenadine at night if itching is severe
Antibiotics are generally not required.
In case she gets fever and is recurrent , or shows other signs of infection you may consult a doctor and start on a course of erythromycin(rule out
allergy).
Keep a watch on the progress for the next 2-3 days and check improvement.
Hope this helps