· Colonoscopy: This is a procedure in which a long, flexible tube with a camera is inserted into the rectum to examine the colon.
· Sigmoidoscopy: This is similar to a colonoscopy, but it only examines the lower part of the colon.
· Blood tests: Blood tests can help to check for anemia, inflammation, and other problems.
· Stool sample: A stool sample can help to check for bacteria and other infections.
