Where should I doctor look to see if the large intestine is working properly?

A doctor can assess the functioning of the large intestine by evaluating symptoms, conducting a physical examination, and reviewing medical history. Diagnostic tests such as a colonoscopy, abdominal imaging (like CT scans or X-rays), or stool tests may also be used to check for abnormalities or dysfunction. Additionally, the doctor may look for signs of conditions like constipation, diarrhea, or inflammatory bowel disease, which can indicate issues with the large intestine.