Can a childs temperature go up while sleeping?

A little: All of us have higher body temperature at night than in the daytime, usually only by one or two degrees. Normal at night can be up to 100 or so, and some children sweat normally while sleeping. But night is also the most common time to have a fever, especially if the temp is over 100 or even higher.

Consult yourMD asap: Babies have what we call poikilothermia. Poikilothermia is temperature dependence with respect to the environment. This is because they have an immature temperature regulation center (hypothalamus). In utero, they have the temperature equal to that of the environment. So if you decrease the temperature, his/her body temperature will also fall. This is why we always keep babies warm asap.