Obesity is a condition defined by a marked accumulation of excess fat. Fat that grows just below the skin, called subcutaneous fat, is the kind that jiggles and wiggles. A second type can accumulate around your internal organs; this is called visceral fat.
Both can trigger health problems ranging from numerous types of chronic disease to potentially life-threatening conditions. The Centers for Disease Control and Prevention indicates your risk of 13 types of cancer increase when you are overweight or obese. These account for about 40% of all diagnosed cancers.