Decreases normal body function. Obesity affects psychologically and physiologically. It could compromise children's health. Complication of obesity can include cardiovascular disease, low self-esteem, high blood pressure, respiratory problems, and gastrointestinal problems. If obesity is not managed in childhood, it leads to negative health consequences in adulthood. At the cardiovascular system level, many obese children suffer from hypertension, coronary heart disease and dyslipidemia. Obesity causes an increase in blood volume and cardiac output. This leads to cardiovascular problems. Obese children are at greater risk of musculoskeletal problems. Obese children are more likely to have fractures, reduced mobility and musculoskeletal disorders. This could be due to lack of physical activity. Obese children have difficulty breathing while walking. If they walk for only 5 minutes, they feel tired and out of breath. There is a higher prevalence of asthma in overweight children. Obstructive sleep apnea is one of the most important risk factors associated with hypertension, cardiovascular disease and cerebrovascular disease. In female obesity, there is a high probability of menstrual abnormalities such as amenorrhea and metrorrhagia. They should be taken to specialists soon to preserve their fertility. Obese children may experience early puberty. Self-esteem is the factor that makes us confident and feel comfortable interacting