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Bedwetting or nocturnal enuresis is involuntary passage of urine while the child is asleep at an age beyond which the sphincter control is normally developed. An occasional lapse by child should not cause concern. Bedwetting is of two types - Persistent (or primary) type and the Regressive type. In persistent type child has never been dry at night and in regressive type, the sphincter control is developed at normal age and child remains dry for several months after which child again starts wetting bed at night. Prevalence of nocturnal enuresis at 5 yrs of age is 7% for males and 3% for females. At 10 yrs of age it is 3% for males and 2% for females and at 18 yr of age it is 1% for males and rarely present in females. There is a marked familial pattern. Persistent Type Persistent type of bed wetting is due to delay in maturation of neurological control of sphincters. Persistent type of nocturnal enuresis may also be due to inadequate or inappropriate toilet training. Parents wh...