Level 1: Causes and preventive measures of bedwetting in children 1. Causes of bedwetting in children Child bedwetting refers to children over 5 years old who urinate involuntarily at night. This phenomenon may be caused by physical or psychological problems. Physiological aspects include small bladder capacity, overactive bladder at night, etc.; psychological aspects include changes in family environment, emotional problems, etc. 2. Preventive measures For bedwetting caused by physiological reasons, methods such as training bladder capacity and water drinking can be used to prevent it; for bedwetting caused by psychological reasons, parents need to pay attention to their children\’s emotional state.