Fatty stools are loose stools with an excess amount of neutral fat. It can be a consequence of various gastrointestinal diseases or excessive consumption of fatty foods. Fatty stool can cause not only severe bowel dysfunction, but also other associated symptoms. For example, fatty stools can lead to weight loss, resulting in hormonal disorders and further health problems. Also, if left untreated, stool can become so oily that when you defecate, not only feces are released, but also fat components such as water and gases. In addition, fatty secretions can lead to exacerbation of chronic diseases, since fats are complex substances.