Risk factors

Bed-wetting can affect anyone, but it's twice as common in boys as in girls. Several factors have been associated with an increased risk of bed-wetting, including:

• Stress and anxiety. Stressful events — such as becoming a big brother or sister, starting a new school, or sleeping away from home — may trigger bed-wetting.
• Family history. If one or both of a child's parents wet the bed as children, their child has a significant chance of wetting the bed, too.
• Attention-deficit/hyperactivity disorder (ADHD). Bed-wetting is more common in children who have ADHD.