Bedwetting - Causes of bedwetting
NHS Choices Medical Reference
There are a number of causes of bedwetting (nocturnal enuresis), and sometimes there may be more than one underlying cause.
An overactive bladder is a common cause of bedwetting. This is when the bladder wants to squeeze out urine before it is full, or before you are ready.
An overactive bladder often causes urge incontinence, where you have a sudden urge to urinate and you are unable to hold it in.
Underlying health conditions
Bedwetting can also be caused by a number of underlying health conditions. For example:
congenital abnormalities (present at birth) such as an ectopic ureter (where the tube through which urine passes does not lead to the bladder), or
such as spina bifida (a condition that affects the development of the spine and nervous system).
Bedwetting may simply be caused by drinking too much fluid. It can also be the result of a number of chronic (long-term) conditions, such as:
In some cases, bedwetting can be a sign that your child is upset or worried. Starting a new school, being bullied or the arrival of a new baby in the family can all be stressful for a young child.
If your child has started wetting the bed after being dry for a period of six months or more (secondary nocturnal enuresis), it is likely that stress or anxiety is causing it.
Constipation: Constipation is when you pass stools less often than usual, or when you are having difficulty going to the toilet because your stools are hard and small.
Brain: The brain controls thought, memory and emotion. It sends messages to the body controlling movement, speech and senses.
Bladder: The bladder is a small organ near the pelvis that holds urine until it is ready to be passed from the body.