What is the cause of greasy and oily stool?

Oily greasy stool can range from "minor" to "alarm". It is the indicator of problematic digestive system. But generally, all you need to do is to observe your stool. I believed that it is hard, but it is not - it is actually very easy identify if you are passing fatty stools. The high-fat content of the stool will make your stool bulky with an oily appearance that smells odd and bad. You may even notice that your stool is frothy with a pale look to it. As you can see, you have problems with it because you see some bubbles.

Anyway, you should run some tests just to see what is your problem.