Baby Has A Temperature Of 37.4 Baby Temperature But No Symptoms Or Illness...?

Baby temperature but no symptoms or illness...? - baby has a temperature of 37.4

She is 13 months and has a temperature of 37.4 under the arm and 38 in the neck (because they do not know where to check)
She is happy to eat and sleep well and do not seem ATALL little, but just feels hot, "Is that right? Am I paranoid or is it still dangerous?.,