Bedwetting is nighttime wetting in bed in a child over 7 years old. Sporadic bedwetting occurs frequently (5-10% of children at 7 years), with a recovery rate of 15% per year. 7% of bedwetting people still have this problem during puberty. Bedwetting often occurs in family.

Bedwetting is the result of a (combination) of the following mechanisms :
- too bulky urine output at night
- too small a blowing capacity
- a reduced stimulus to wake up with a full bladder

The diagnosis of bedwetting is made on the basis of the following 3 examinations:
- Urinalysis : to rule out infection
- Urine calendar : the doctor will ask you to keep a urinary calendar. This calendar gives an indication of the volume of the bladder, the nocturnal urine production and the volumes that are drunk at what time of the day.
- Uroflowmetry (measurement of the flow of urine) and ultrasound of the abdomen and kidneys.

To cure bedwetting, behavioral changes will initially be recommended: adjusting eating and drinking habits, avoiding bladder-irritant drinks, setting up a late-night wake-up system, and rewarding the child when it stays dry. Continuous and sustained motivation of the child by his parents is and remains essential when wetting the bed.

In addition, in some cases bedwetting is treated with a bedwetting alarm: as soon as the diaper pants get wet to a minimum, an alarm is triggered. Through habituation, the child learns to get up preventively for a urination so that bedwetting is avoided.

In some cases, bedwetting is additionally treated with medication:
- Desmopressin in case of excessive nocturnal urine production
- Anticholinergics with a small bladder capacity