When i go to sleep my temperature increases causing me to wake up in the middle of the night and not go back to sleep until i am cooled off. why?

Temperature: When you sleep your body temperature drops, so the outside temperature will feel hotter than it really is. Sleep with a light sheet. If the heat is on turn it down five degrees while you sleep.

Your problem is rare: If indeed your core body temperature (oral or rectal) actually increases during sleep, then you would have a very rare condition--one worthy of study by a circadian rhythm researcher. Body temperature normally goes down during sleep. If yours goes up, you might not produce melatonin, which causes core temperature to drop and which facilitates sleep. A circadian phase disorder is also possible.