Toddler burning hot

Whenever my 2 year old naps or falls asleep for the night she suddenly turns really hot all over , it really worries me as i just noticed this happening a few days ago, she wears underpants and a t shirt when we are in the house and she does not sweat so i know it isn’t the temp of the apartment. It’s just her body it skips warm and goes straight to hot it’s so weird we try taking blankets off at night but she wants them on .. any suggestions