Obesity is a condition in which the natural energy reserve, stored in the fatty tissue of humans and other mammals is increased to a point where it is associated with certain health conditions or increased mortality. Although, obesity is an individual clinical condition, it is increasingly viewed as a serious and growing public health problem. Excessive body weight has been shown to predispose to various diseases particularly cardiovascular diseases, diabetes mellitus type 2, sleep apnea and osteoarthritis. Obese people are seen to be less active than lean people. A controlled increase in calorie intake of lean people did not make them less active; correspondingly when obese people lost weight they did not become more active. Weight stigma also known as weightism, weight bias and weight-based discrimination, refers to invidiously discriminatory attitudes towards overweight/obese individuals that influence interpersonal interactions. Weight stigma reflects internalized attitudes towards overweight and obese people and affects how these people are treated. Combined diet and exercise as well as drug therapy is effective for the prevention and management of obesity and overweight.