Fever with body aches going on 3 days?

Do you have any other associated symptoms such as congestion, runny nose, sore throat, cough, problem with voiding, etc. We need more info because the 2 symptoms fever and body aching can be benign with viral infection but it could be dangerous if not treated in case of bacterial infection. You can take tylenol 500 mg or advil 200 mg x 2 every 6 hours as needed in the mean time for a day or two.

Viral illnesses such as "flu" and Covid-19 are at the top of the list of causes of acute febrile illnesses. Have her checked at urgent care facility.