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) beyond 5-6 years is not normal and should be evaluated thoroughly.there could be chances of nerve damage
, infection , psychological effects.This could be associated with sleep disorders also.I advise her to visit Urologist
and discuss about the problem.There are various techniques to make a habit of controlling urine and also drugs to treat Enuresis .
If you have any more questions you can feel free to mail me or post a comment here.