I saw melted cheddar cheese that i ate in my stool. i also have stabbing pains in abdomen and lumps in rectum? what are the causes?

? steatorrhea: Abdominal pain and fat in stool may suggest malabsorption, lumps in your rectum need to be looked at.

Need more info: It is unlikely that melted cheddar cheese made it through your intestine unchanged. However, cheese does lead to constipation in a large number of people which can cause abdominal pain. Constipation can also cause thrombosed external hemorrhoid presenting as lumps at the anus.