Hi...Thank you for consulting in Health Care magic.
Fever of four days without any localizing signs could as well a viral illness. Usually rather than fever, what is more important is the activity of the child, in between 2 fever episodes on the same day. If the kid is active and playing around when there is no fever, it is probably and it doesn't require antibiotics at all. Once
viral fever comes it will there for 4-7 days. So do not worry about duration if the kid is active.
Sores in throat and
rash appearing is one more evidence that it is viral illness.
You can treat fever with
Paracetamol at 15mg/kg/dose every 4-6th hourly if fever is > 100F. I suggest not using combination medicines for fever as usually most combination medicines combine Paracetamol with NSAIDs and is not advisable.
Hope my answer was helpful for you. I am happy to help any time. Further clarifications and consultations on Health care magic are welcome. If you do not have any clarifications, you can close the discussion and rate the answer. Wish your kid good health.
Dr. Sumanth MBBS., DCH., DNB (Paed).,