Many children still need a diaper at night, even when they use the toilet during the day. Some children wet at night until age 7 or older. If a parent wet the bed as a child, the child may also. Do not make your child feel ashamed.
To help prevent accidents at night, limit how much your child drinks after dinner. And make sure your toddler uses the toilet just before bedtime. If you are worried, talk to his doctor.