A rectal exam is a quick physical exam where a healthcare provider inserts a gloved, lubricated finger into the rectum to check for abnormalities. The whole thing takes only a few seconds. It’s one of the simplest and oldest diagnostic tools in medicine, used to assess everything from prostate health in men to hemorrhoids, rectal masses, and bowel issues in both men and women.
The formal name is “digital rectal exam,” or DRE. “Digital” here refers to the digit (finger), not technology. Despite its simplicity, the exam gives a provider surprisingly useful information about structures they can feel through the rectal wall.
What Happens During the Exam
No special preparation is needed beforehand. You don’t need to fast, use an enema, or do any kind of bowel prep. You’ll typically be asked to lie on your side with your knees pulled up toward your chest, though some providers may have you bend forward over an exam table or lie on your back with your knees apart.
The provider starts by visually examining the outside of the anus, looking for hemorrhoids, fissures (small tears), or skin changes. When you’re ready, they’ll ask you to take a deep breath and relax. They then gently insert a lubricated, gloved index finger into the rectum.
In men, the provider feels for the prostate gland, which sits just in front of the rectal wall. They’re checking its size and surface texture, feeling for lumps, hard spots, or unusual enlargement. After that, they sweep the walls of the lower rectum and colon, checking for masses or other abnormalities. In women, the exam follows the same process but without the prostate assessment. The provider examines the rectal and lower colon walls for polyps, masses, or tenderness.
You may feel brief pressure or a sensation like you need to use the bathroom. That feeling passes as soon as the finger is removed. The entire insertion and examination lasts just seconds.
What a Rectal Exam Can Detect
The exam screens for a range of conditions depending on your symptoms and why it was ordered:
- Hemorrhoids and anal fissures: Visible during the external portion of the exam.
- Prostate enlargement: An enlarged or irregularly shaped prostate can signal benign prostatic hyperplasia (a common, noncancerous enlargement) or, less commonly, prostate cancer.
- Rectal masses or polyps: Lumps or growths along the rectal wall that may need further testing.
- Fecal impaction: A hardened mass of stool that hasn’t passed, common in older adults or people with chronic constipation.
- Tenderness or inflammation: Which can point toward infections, abscesses, or inflammatory bowel conditions.
Providers also sometimes perform a rectal exam as part of an abdominal pain workup or during emergency evaluations to check for internal bleeding.
The Rectal Exam and Prostate Cancer
For years, the rectal exam was a cornerstone of prostate cancer screening. That role has shifted significantly. Current guidelines from the American Urological Association state that the DRE should not be used as a first-line screening test or as a replacement for a PSA blood test in men without symptoms.
The reason comes down to accuracy. A large meta-analysis found that the DRE catches about 53% of prostate cancers (meaning it misses nearly half) and correctly rules out cancer about 84% of the time. The PSA blood test performs better on both measures. Adding a rectal exam on top of PSA testing didn’t meaningfully improve detection rates in the research. The positive predictive value, meaning how often an abnormal result actually turns out to be cancer, was roughly 21% for either test alone or combined.
There’s a practical side too: survey data show that nearly a quarter of men will skip prostate cancer screening altogether if it includes a rectal exam upfront. That reluctance means fewer men get screened at all.
That said, the rectal exam still has a role. In men who already have symptoms like difficulty urinating, pelvic pain, or blood in the urine, a DRE is useful as a diagnostic tool rather than a screening one. And for men already getting PSA testing, a provider may use the DRE alongside those results to get a fuller picture of risk.
What Happens if Something Feels Abnormal
An abnormal finding on a rectal exam doesn’t automatically mean cancer or a serious condition. Enlarged prostates are extremely common in men over 50, and many rectal lumps turn out to be benign polyps or hemorrhoids. But abnormal findings do trigger follow-up testing to get a clearer answer.
For suspected prostate issues, the next step is usually a PSA blood test if one hasn’t been done recently, followed potentially by an MRI or ultrasound-guided biopsy if results are concerning. For rectal masses or polyps, a colonoscopy allows the provider to visualize the growth directly and, if needed, remove it or take a tissue sample during the same procedure. If rectal cancer is suspected, a pelvic MRI provides detailed images of the rectum and surrounding tissues, including nearby lymph nodes, to determine whether and how far a tumor may have spread.
Why Providers Still Use It
The rectal exam is fast, requires no equipment, involves no radiation, and gives immediate results. A provider can feel things in seconds that might otherwise require imaging to detect. For conditions like fecal impaction, a rectal abscess, or severe hemorrhoids, the exam often provides a definitive answer on the spot. It’s also routinely part of pelvic exams in women when there’s concern about masses or pain that could involve the rectum or surrounding structures.
The discomfort is real but brief, and most people describe it as awkward rather than painful. Relaxing your muscles, particularly on a slow exhale, makes the insertion easier. If you experience significant pain during the exam, let your provider know immediately, as that itself can be a diagnostic clue pointing toward a fissure, abscess, or inflammation that needs attention.