Thanks for posting your query.
Your girlfriend is most likely suffering from Acute upper respiratory infection
with involvement of middle ear. Middle ear and nasopharynx
is connected by each other by eusthcian tube.
Acute upper respiratory infection are most likely viral in origin which may cause skin rash
There are multiple variety of virus which may cause rash with fever.
You should consult with internal medicine specialist and take proper treatment.
These Viral rash
with fever has self remitting disease period of 3-4 days during which disease may persist and progressively subsides.
Take care & wishing a very speedy recovery.
Dr. Mayank Bhargava