My DD has been dry at night for years - has had the odd accident here and there but generally has a bladder of iron 
. Over the last week she's wet herself three times - twice in the day and once at night. It's really upset her and she's called herself a naughty girl. I've assured her she's not and that it's an accident but we are both concerned at why it's started happening. Does anyone have any idea or experience of this?