My 16-month-old boy has a fever of 39.7 degrees. It started this morning at 39. It's not decreasing much between doses of Tylenol and Advil. What should I do?

If a 16-month-old child has a fever of 39.7 degrees that is not decreasing much between doses of Tylenol and Advil, it is recommended to give Advil because it lasts longer. Consult a doctor if the fever persists without an apparent reason for more than 3 days, especially if the child looks very ill or has a fever above 40°C.