what is oily stool
Bile salts from the liver give stool its brownish color and when bile output is diminished, it often first appears as yellow stool. If the stool is also greasy and foul-smelling, there may be excess fat in the stool -- causes include malabsorption disorders such as celiac disease. If the onset is sudden, yellow stool can also be a sign of a bacterial infection in the intestines.