Another factor that can cause bedwetting in children is to do with the kidneys. And that is when the kidneys make too much urine while asleep. To help you understand this better, I’ll first explain what normal kidney function is at night. The brain produces a hormone called antidiuretic hormone (ADH).

This hormone’s role is to slow the kidney’s urine production during sleep, so it helps make less urine at night. So, for a child that wets the bed, their brain may not be making enough ADH while they’re sleeping, or the kidneys stop responding to the hormone. This then causes the kidneys to produce more urine.

So the child will have to either wake up several times during the night to do wee, or wet the bed. This is not controlled by them. 

Then there’s the controllable factors that can cause the kidneys to produce more urine, and these are what your child is putting into their body! Such as fizzy drinks or drinks containing caffeine. So it’s best to avoid giving these drinks to your child in the evenings, which include hot chocolate, tea, coffee and soft drinks.

On a lesser extent, bedwetting can sometimes be caused by enlarged kidneys or chronic kidney disease. Children with kidney disease might experience weight loss, increased thirst or increased need to wee. This is all in addition to bedwetting.