I am a 47 year old male and wake up every hour or so in the night in a bad sweat!

I am a 47 year old male and wake up every hour or so in the night in a bad sweat, what could cause this?

I am 59 and I passed the same stage at that age. Where do you want me to start from ?
As it already suggested, apnea in your sleep, may be the main factor. Diabetes can be another candidate.
I shouldn't go on. One thing is absolutely imperative. Visit and check with your doctor. Don't let it go on. It can be very serious and leaving it unchecked can make it worse.