Childhood obesity can affect height. In the early stages of obesity, children can exceed the height and weight of children of the same age and gender due to excess nutrient intake. As the time of obesity increases, obesity can affect the bone age of the affected child, resulting in earlier bone age and earlier closure of the epiphysis of the bone, causing the final height to lag behind the expected height. Therefore, obese children must have their bone age tested to determine whether their bone age is advanced, and they must also control their weight in time to avoid their final height falling below the expected height. When obese children come to the hospital, they should have their bone age monitored and their blood glucose, lipids and uric acid checked, so that they can monitor their bone age and metabolism during regular follow-ups. In the case of obese children, the bone age is routinely determined by a bone x-ray of the left wrist, and the mineral content of the bones can also be determined by dual-energy x-ray bone density. For obese children, active exercise can be used to reduce weight and promote height growth.