Can't figure this out..  In the middle of the night I wake up to find my self with a hard on.  I also find I have to go the bathroom as well  After I pee the erection goes down and I go to sleep.   Any ideas what is causing this?

This is just too weird.  I feel I am a teenager again.

Totally normal, Goldenlight,

Ever hear of NPT = Nocturnal Penile Tumescence? Ok, didn't think so. Hence, a link is attached.

It's when you DON'T have NPT's that we need to start worrying about ED,
The Love Goddess

I have this at night.  According to my urologist, it's from squeezing the muscles tightly during sleep to retain the urine.  Pee, go back to bed.  Try cutting down on liquids before sleeping to minimize it.
skb

I've had this my whole entire life. No problem, just a solution to not wetting the bed while getting a little more sleep.

Getting a good erection at night like that with nothing to do with it and unable to get one when it could do some good (for you and her).

Trust me, I know.

Yep that's one way to get pee on the ceiling.

I love erotic dreams, especially if they're lucid. Dreaming can be one cause of your erection. The connection between having to pee and having and erection is one lots of men experience, too. SInce peeing uses many of the same muscles (and can sometimes be almost as gratifying!!) as ejaculating, when you get the urge to pee, that could provide the spark that begins an erotic dream and leads to a hard-on.

If the waking up is bothering you, try not drinking anything for a coupe for hours prior to bed but make sure you;re hydrated during the day.

Me? I just enjoy it!

Talk about taking your own golden shower!!!!