My body rises to a feverish temperature when I'm sleeping, why could this be?

I do not know how old you are, but That sounds like night sweats or hot flashes. There are many causes. I know of two causes. One is pregnancy, I know because I am pregnant. another is menopause which is when a woman has no more periods. I think stress can cause it to. It might have to do with your hormone levels. They might be off slightly.