Whenever I give a talk about bedwetting, somebody in the audience raises a hand and asks about constipation. It is one of the most common questions parents bring to my clinic. They have read online that constipation is a major cause of bedwetting, and they want to know if their child needs a bowel program before anything else.
After more than forty years of treating bedwetting, my honest answer is this: in the great majority of children I see, constipation is not part of the picture at all. The child has a normal bowel pattern, and the bedwetting is its own problem with its own cause, which is the brain's failure to wake to a full bladder during sleep. The two issues are not as intertwined as the literature sometimes suggests.
When the two do happen together
There is a smaller group of children where both conditions are present at the same time. These cases exist, and they deserve a careful answer. In those families, the question becomes: which problem do we treat first?
Here I want to share something that often surprises parents. In the bedwetting children I have treated who also had constipation, treating the bedwetting alone has very often resolved the constipation as well, without any separate bowel program. The reverse is much less common.
Why this happens
Behavioral treatment works on more than just the specific behavior you are targeting. When a child goes through a structured nightly routine with a bedwetting alarm, they begin to pay closer attention to their body. They learn to listen for cues they had been ignoring. They develop a stronger sense of when their bladder is full and when it is not.
That heightened body awareness rarely stays confined to nighttime urination. It tends to spread. The child notices when they need to go to the bathroom during the day. They notice the urge for a bowel movement and respond to it instead of ignoring it (which is one of the most common reasons children become constipated in the first place). The whole pelvic system starts to communicate better with the brain.
So although we are not directly treating constipation, the behavioral change cascades. One habit improves, and others tend to follow.
Constipation as a contributing factor, not the root cause
When constipation does coexist with bedwetting, I describe it to parents as a contributing factor rather than the underlying problem. A loaded rectum can mechanically reduce bladder capacity, and that can make a difficult bedwetting case slightly worse. But the deep sleep, the immature waking response, the genetic component, these are the actual drivers of bedwetting, and they will not improve simply because the bowel does.
This matters because some children spend months on bowel programs hoping it will solve the bedwetting on its own. It usually doesn't. Meanwhile, the real treatment, the part that addresses the underlying sleep-waking mechanism, has been postponed.
What I tell parents
If your child has bedwetting and you suspect constipation as well, talk to your pediatrician about both. If the constipation is moderate, it is worth addressing alongside the bedwetting treatment, not as a substitute for it.
But do not let the bowel question delay the right treatment for the bedwetting itself. Behavioral alarm therapy works on the actual cause, and in our experience, it tends to bring the rest of the pelvic-floor habits into line along the way.