Obesity is a medical condition characterized by an excessive accumulation of body fat to the extent that it may have a negative impact on an individual's health. It is typically determined by calculating a person's body mass index (BMI), which is a measure of body weight relative to height.

In general, a BMI of 30 or higher is considered indicative of obesity. However, it's important to note that BMI is a rough estimation and does not take into account factors such as muscle mass or distribution of fat in the body.

Obesity can result from a combination of genetic, environmental, and behavioral factors. Contributing factors may include overeating, a sedentary lifestyle, genetic predisposition, hormonal imbalances, certain medical conditions, and socioeconomic factors.

Obesity is associated with a higher risk of various health problems, including but not limited to type 2 diabetes, heart disease, high blood pressure, certain types of cancer, sleep apnea, osteoarthritis, and psychological issues such as depression and low self-esteem.

Treatment of obesity typically involves a combination of lifestyle changes, such as adopting a healthy diet, increasing physical activity, and behavior modification. In some cases, weight loss medications or bariatric surgery may be recommended for individuals with severe obesity.

It's important to approach obesity with a focus on overall health and well-being rather than solely on appearance, and to seek guidance from healthcare professionals who can provide personalized advice and support.