Everything was okay physically
At first I took my son to the urologist. I wanted to know if everything was okay physically. I had no idea what was causing it. The urologist examined my son and said that there was no physical cause. After that I felt at a loss and didn't know what to do next. Then I went to a different urologist. But he also said there was no physical cause.
I started to think about why he might have this problem, and thought about my family. My husband's brother also wet the bed until he was grown up. I just happened to hear this by chance from my mother-in-law. A cousin of mine and my father's cousin also wet the bed. So I thought it might run in our family.