In a recent report on childhood obesity, the British Medical Association described the significant increase in levels of childhood obesity as a ’cause for great concern’ and stated that healthcare professionals have a pivotal role to play in tackling this epidemic. It is estimated that there are now approximately 1 million obese children under the age of 16 in the UK and numbers are increasing annually. In this article, we review the impact of this growing epidemic, the underlying causes and how healthcare professionals can help.