The prevalence of childhood obesity is increasing. This is because of the drastic lifestyle changes. The easy availability of high calorie food with restricted physical activity has made obesity a global problem. Childhood obesity mostly progresses to adult obesity. A child with excessive weight not only suffers from the physical/ external adverse effects but also metabolic/internal consequences also. The external ill-effects include restricted physical functioning, breathing issues, excessive sweating and negative body image leading to lack of confidence. However, the internal ill-effects include insulin resistance/diabetes, cholesterol abnormalities and high blood pressure. All these affect the normal functioning of the heart and its diseases early in life. A Pediatric Endocrinologist will be able to detect the adverse consequences of increase weight gain and also find out the cause of increasing weight in a child and advice appropriate lifestyle changes along with the medications if needed.