A lot of things can cause bed-wetting, and identifying the cause can be an important step in resolving the problem. Some of the causes of bed-wetting are:
Some children do not yet have bladders that are fully developed in size which makes it harder to hold the amount of urine produced over night.
Inability to Recognize a Full Bladder
The nerves that control the bladder can also be slow to develop, which means that for some children a full bladder may not be enough to wake them.
A Hormone Imbalance
Some children may experience a deficit of anti-diuretic hormone (ADH), which helps to limit the amount of urine created, is otherwise. A deficit of ADH can cause too much urine to be produced, which can cause night time enuresis.
Anything that causes stress, like starting a new school or a divorce, can trigger bed-wetting.
Urinary Tract Infection
Just like in adults, a urinary tract infection or other kind of infection can cause incontinence, which may manifest as bed-wetting.
Bed-wetting can be a sign of sleep apnea caused by inflamed or enlarged tonsils or adenoids. Other symptoms of sleep apnea include snoring, ear or sinus infections, sore throat and daytime drowsiness.
If a child is dry at night for a few months or more and then begins bed-wetting, this can be the first sign of diabetes. Other symptoms include passing large amounts of urine at once, increased thirst, fatigue and weight loss that does not result from a change in diet or exercise.
Constipation can put pressure on the bladder, which can decrease the bladder’s capacity and cause bed-wetting.
A Structural Problem in the Nervous System or Urinary Tract
Bed-wetting might be a sign of some other problem in your child’s nervous system or urinary tract. This is rare, but bed-wetting might be the first sign of one of these more serious problems.