Bedwetting and urinary incontinence beyond the age of five years usually warrants investigation as it can be very distressing both for the child as well as the family. The problem should be assessed to decide on appropriate treatment options based on the underlying cause. The investigations are largely non-invasive and painless and both the child and their family should feel supported while they await a resolution of the problem. This section, headed by the Great Ormond Street and University College London experts, covers the areas that parents need to know as well as explaining the latest treatment technologies and solutions.