Nocturnal Enuresis (NE) is intermittent involuntary voiding of the bladder during sleep in 20% of children aged 5 years or over. For these one in five children who 'wet the bed' it is a young child's worst nightmare particularly as he or she gets older and gets invited to 'sleep overs'. Not only is it a very stressful and socially embarrassing time for the child, it can also become a burden on parents and carers. In a new study published in Lasers in Medical Science (Jan 2017