One of my children have been a bed wetter. They have outgrown the time period where it is typical and moved on to the embarrassing stage. We blamed it on the fact that he is a very, very heavy sleeper. I never thought much past that.
I had taken him to the naturopath for allergies and she asked about his history. She asked if he is a bed wetter. She then proceeded to tell me that she is seeing a big correlation between bedwetting and dairy. I had never heard of that. He didn't have much dairy but after her conversation, I noticed that the nights that he did wet his bed, he had some sort of dairy the night before.
We have been off dairy for a while and he hasn't wet the bed in several months. However, he decided to go get an ice cream sunday with friends by himself the other day. Free agency is a kicker. That night, I awoke to the sound of the shower. Yep. He wet the bed. I asked him if the ice cream sunday was worth it. It was good for him to see that there was no doubt that dairy was the trigger. I guess you need a little reminder now and then.
If you have a bed wetter, give it a try. You need to give it a couple weeks for the system to clean out a bit.
It never ceases to amaze me that food is the link to most every problem out there, if not all.