Calculating childhood obesity is more complex than adult BMI because it requires tracking development along a growth curve rather than relying on a single static number. Pathophysiologically, pediatric obesity is not merely an excess of fat but a combination of energy imbalance and hormonal disruption. Excessive caloric intake increases not only the size but also the actual number of adipocytes, leading to insulin resistance and a constitution more prone to weight gain. In Traditional Korean Medicine (TKM), this condition is interpreted as 'Dameum' (痰飮, phlegm-fluid retention), where metabolic waste fails to be excreted and accumulates in the body. Specifically, when there is 'Bi-heo' (脾虛, Spleen Deficiency), the digestive and absorptive functions weaken, causing nutrients to accumulate as 'phlegm' instead of being converted into energy. Therefore, indiscriminate calorie restriction is dangerous, as children require essential nutrients for growth. The goal of TKM is to strengthen the Spleen function to clear metabolic waste and resolve 'Eo-hyeol' (瘀血, blood stasis) to improve the circulation of Qi and Blood. By enhancing the body's innate metabolic capacity, we can manage weight while ensuring the child grows healthily. Accurate obesity measurement is the first step in determining whether a child is experiencing a growth spurt or metabolic stagnation.