A bulging belly not just looks bad but it is also harmful to your health. Being obese or overweight is not the only cause of belly fat even thin people have some belly fat. Some fat may be right under your skin and you can easily see it when you hold your belly. This is type of fat is called soft fat. You may also have fat around your organs like lungs liver kidneys and heart. This is type of fat is called visceral fat or hard fat. As it lies deep under the skin you cannot see hard belly