Obesity can be described as the “New World Syndrome”. The increasing prevalence of medically significant obesity raises great concern. The rapid spread of urbanisation and industrialisation and dramatic lifestyle has led to the pandemic of obesity, even in developing countries. The prevalence of obesity has also risen in children and adolescents. Diseases commonly associated with obesity in adults, such as T2DM, hypertension, hyperlipidemia, gallbladder disease, non-alcoholic steatohepatitis, sleep apnoea, and orthopaedic complications, are now increasingly observed in children. Hence, prevention of obesity during childhood should be considered a priority, as there is a risk of persistence to adulthood and also we require a strong and adherent strategies focussing on those with existing weight problems and also on those at high risk of developing obesity. This article highlights various preventive and treatment aspects of obesity.