When you have a bowel movement what is large fat white thing in your stool?

The large, fat, white thing in your stool is most likely undigested fat. This can happen for a variety of reasons, including:

* Eating a high-fat diet: If you eat a lot of fatty foods, your body may not be able to digest all of the fat. This can lead to undigested fat in your stool.

* Malabsorption: Malabsorption is a condition in which your body is unable to absorb nutrients from food. This can be caused by a variety of factors, including celiac disease, Crohn's disease, and pancreatitis. Malabsorption can lead to undigested fat in your stool.

* Medications: Some medications, such as antacids and laxatives, can interfere with the digestion of fat. This can lead to undigested fat in your stool.

* Medical conditions: Certain medical conditions, such as liver disease and gallbladder disease, can also lead to undigested fat in your stool.

If you are concerned about the appearance of your stool, it is important to talk to your doctor. They can help you determine the cause of the undigested fat and recommend treatment if necessary.