What Causes Night Sweats In Chest And Face?

I have been experiencing night sweats lately but only in the chest area and face. I am so hot I can barely breathe and it wakes me up, once I get up out of bed I cool off and can go back to sleep. This happens about every 2 hours during the night. It also happens sometimes during the day but not as regulary. What could this be and what can I do about it? I am very tired each morning.