My boyfriend says when he pees it burns and blood comes nout what might that be from?

It could be a number of things. He needs to go to the dr's. It could be anything from a uti to an std. it's impossible for us to diagnose it.

If he is still alive in the morning, have him go to the doctor. It can be something minor like some simple STD to some seroius issues with the kidneys to more.