Childhood obesity may be harmful to children in several ways.Obese children are: more prone to being teased by others and may have a lower sense of self-worth. This may lead to higher rates of loneliness, sadness and nervousness. more likely to smoke and use alcohol. at higher risk of developing health problems like high blood pressure, sugar and cholesterol, sleep apnea, and asthma more likely to be obese as adults. more likely to develop chronic health problems like hypertension, diabetes, high cholesterol, heart disease, stroke and kidney problems as young adults.