This guideline covers diagnosing and managing constipation in children and young people up to 18. It provides strategies to support the early identification and timely, effective treatment of constipation which will help improve outcomes for patients. It does not cover constipation caused by a specific condition. In July 2017 we updated the footnote to recommendation 1.1.4 to link to the newest NICE guideline on coeliac disease, and the footnotes in table 4 with manufacturer information that has changed since original publication.