In kids Bed Wetting or nocturnal enuresis can last up until the child turn 15 years old.
But sometimes enuresis or bed wetting can stop sooner or even sometimes be life long.
If bed wetting continues after 15 years of age then you should take your child to see the doctor to find out if anything else is wrong.
You should take your child to the doctor anyway before age 15 so they can treat your child's bed wetting.
Your child's doctor can prescribe medication for bed wetting to help slow the production of urine.