Most fevers in children are viral in origin and take 3-7 days to subside completely. If NOT accompanied by other symptoms like vomiting or loose motions or coughing and breathlessness or dullness and refusal to feed,just give paracetamol for fever and repeat every 4 hours if required. If not improving OR accompanied by above,consult ANOTHER paediatrician. Ensure a healthy balanced diet and plenty of fluids.