I was literally just about to post about this.
My 5 year old has wet her bed twice in the past week. She has also had a few accidents at school. I did take her to the dr for it previously, but there was nothing wrong (not saying you shouldn't get it checked out).
I assume she is in school? Check there isn't bullying going on or any issues with kids. My little girl has a lot of trouble with one child in her class, although it is a widespread problem that the entire class struggles with. I had to bring it to the teacher's attention last year, and had to make a call to this year's teacher and principal already this year as well.
My childminder brought it to my attention this morning that she has been complaining of nightmares. She had mentioned it to me in passing before, but I thought nothing of it. Apparently she has been struggling very badly the last while with these nightmares. I'm thinking this is what is leading to her latest trouble with wetting the bed.
Stop for a minute, open your mind, learn. You may not agree with what I say, I may not agree with what you say but we will both learn something new.