If your child's fever has lasted for three days despite taking paracetamol, it is important to consult a pediatrician for a proper evaluation. A persistent fever can sometimes indicate an underlying infection that may require specific treatment, which paracetamol alone cannot cure. In the meantime, ensure your child stays well-hydrated with plenty of fluids, wears lightweight clothing, and rests in a comfortable room. You can continue giving paracetamol strictly as per the prescribed dosage and timing. Please seek immediate medical attention if your child becomes unusually lethargic, has difficulty breathing, develops a rash, or is unable to keep fluids down.