what to do when baby is having a fever? In fact, babies\’ fever is a mechanism of the body\’s self-protection. The normal baby\’s rectal temperature fluctuates between 36.9℃~37.5℃. The sublingual body temperature is 0.3℃~0.5℃ lower than the rectal temperature. The armpit temperature is 36℃~37℃. This difference changes with time. The increase in body temperature becomes less obvious when wearing clothes, and the three are basically the same during high fever. From birth to 4 to 5 months, the baby…