New figures show there are now 124 million obese children worldwide. Alongside the report, the World Obesity Federation also suggests that the global cost of treating obesity will rise to $1.2tn a year from 2025. When the average obese person is a lot younger, will that change obesity management in the healthcare sector? Will it present more complex health problems to a much younger patient profile? And what is the role of surgery in the multi-disciplinary approach to obesity management?