There is helpful information on geocities.com/dhr6878 which is a possibility of what you may have
Hi,
Viral exanthem or rash refers to a widespread rash that is usually accompanied by systemic symptoms such as fever, malaise and headache. It is usually caused by an infectious condition such as a virus or may also be due to a drug.
This is usually resolves spontaneously. Supportive and symptomatic treatment is usually given. If there is fever, paracetamol may be given while topical or oral antihistamines to relieve itch may be used. It is also important that your daughter drink plenty of fluids and have adequate rest.
Take care and regards.