Digital Rectal Exam is a digital rectal examination is a painless examination of your rectal area. During the exam, your doctor inserts a gloved, lubricated finger into the rectum to softly pity any abnormalities. Fecal Occult Blood Test this test looks for occult (hidden) blood in the stool. A fecal occult blood test involves as follows i.e. you will receive three small cards. Place a sample from three consecutive bowel movements on each card. A small amount of the stool is placed on a special test strip and the stool is analyzed for traces of blood. A flexible sigmoidoscopy is employed to look at the rectum and lower colon. Prior to a versatile sigmoidoscopy, your colon must be beyond stool to enable good visibility. Preparations may include a diet, an enema, and laxatives.