Voiding dysfunction is a common problem in childhood and causes concern for parents. Symptoms of this disorder are frequent voiding, urgency to void, and wetness. These symptoms are typical in young children with immature bladders. Development of a mature bladder requires increased bladder capacity, voluntary control of the sphincter muscle, and control of involuntary bladder contractions. Most children achieve adult pattern bladder control by age four. However, almost every child will exhibit some symptoms of voiding dysfunction during the transition from infant to adult patterns of bladder control. Initial examination includes a history and physical examination as well as urinalysis. Timed voiding and anticholinergic medications are effective treatment options for children with urgency, frequency, and urge incontinence. In some cases, a special test of bladder function may be indicated. Children with significant behavioral problems may benefit from behavioral counseling. Children with developmental delays due to persistently immature bladders will often exhibit delays in toilet training.