Thank you for your query.
for 6 days is worrying.
If she persists to have a temperature more than 100F more than 7 days kindly investigate her blood parameters.
Otherwise there is no reason to worry.
Give her lots of fluids and nutritious diet and nasal decongestants.
Consult your doctor if the problem persists.
If you have any further queries you are free to consult me.
Hope this answers your query.
Wishing a speedy recovery.
Have a nice day.