Body heat rises while asleep and skin itchiness

For the last couple of months every time i fall asleep my body heats up and causes itchiness especially if have the blanket on.
Taking it off cools me down some, but its winter here so im usually reluctant to take it off until i cant stand the itchiness any longer. the heat is generally centered around my center and i don't sweat at all whiles its happening.its like the heat you feel after doing exercise. It would be appreciated if anyone could give me any leads on what this is. tends to wake me up 3 hours into sleep and is getting more frequent.