It is recommended to consult a doctor if your child has a fever of 40 degrees Celsius or higher, if the fever persists for more than 72 hours, or if the child's condition worsens (such as significant drowsiness, signs of dehydration, redness, seizures, etc.). If your child seems to be doing well overall, it is not necessary to use medication to lower the fever. It is important to monitor your child's symptoms, ensure they are eating and drinking properly, and consider using the government of Quebec's self-assessment tool to determine the next steps.