I have to say the first thing I thought about was whether some kind of abuse was going on. My (4 yo) nephew was recently having uncharacteristic episodes of enuresis and urinary incontinence which seemed to be related to attendance a local nursery. Mother spoke to the nursery manager who denied any bullying could be taking place, we decided to keep monitoring the situation. Over Christmas, he was completely dry including waking up at night to relieve himself. Second day back at nursery... wet bed and immediately before leaving, wet trousers. He told his mum that two boys at the nursery were hitting him and taking the toys he was playing with. Mother again spoke to the manager, who said she was sure it wasn't happening ("Does he have the names right?"). When picking him up, the manager said they'd caught exactly what was described happening, and "dealth with it". He's been dry since. He's lucky to have such an aware mum. (A colleague also recently attended a collapse ?not breathing which didn't seem right, unresponsive but unexpected reaction to pupillary reaction test. Amazing how fast they come round when you start putting in an OP tube...)