Chronic diseases associated with obesity include type 2 diabetes, cardiovascular diseases, certain types of cancers, and hypertension. Obesity increases the risk of these conditions due to factors such as increased inflammation, insulin resistance, and changes in hormone levels. Additionally, obesity often leads to a sedentary lifestyle, which can exacerbate health problems. Preventing and managing obesity through lifestyle changes such as improved diet and regular physical activity can reduce the risk and severity of these chronic diseases.