Prostate Exam Guide: PSA, DRE and PVR Tests Explained

Author: Ian C. Langtree - View Credentials
Published: 30 Oct 2015 - Updated: 27 Oct 2026
Publication Type: Informative

Table of Contents:
Synopsis - Definition - Overview - FAQs - Insights, Updates - Related Content

Synopsis

This information explains the three tests most often used in a prostate exam - the PSA blood test, the digital rectal exam and the post-void residual test - and sets out how current U.S. guidance has moved away from automatic yearly testing at 40. It compares the U.S. Preventive Services Task Force position, which leaves PSA screening as an individual choice for men aged 55 to 69 and advises against it at 70 and older, with the American Urological Association guideline, which supports a baseline PSA at 45 to 50, regular screening every 2 to 4 years from 50 to 69, and earlier testing at 40 to 45 for Black men and others at higher risk. It also makes clear that there is no single normal PSA number. Drawing on federal health agencies and professional guidelines, it is useful for men weighing whether to be screened, for seniors and people with disabilities who need to balance testing against overall health and mobility, and for caregivers helping someone prepare for an appointment.

At a Glance

• 1 - A post-void residual of 100 to 150 milliliters or more means the bladder is not emptying completely.
• 2 - Cycling and ejaculation can briefly raise PSA, so avoiding ejaculation for 24 hours before the blood test is advised.
• 3 - The USPSTF does not recommend the digital rectal exam as a stand-alone screening test, citing a lack of evidence that it helps.
• 4 - A raised PSA is not proof of cancer, as only about 25 percent of men biopsied for an elevated level are found to have prostate cancer.

Topic Definition

Prostate Exam

A prostate exam is a medical evaluation of the prostate gland, the small organ below the bladder that surrounds the urethra in people born male, used to look for cancer, enlargement, inflammation and problems with urination. It most often combines a prostate-specific antigen (PSA) blood test, which measures a protein made by prostate cells, with a digital rectal exam, in which a clinician feels the gland through the rectal wall, and may add a post-void residual test to check how well the bladder empties. Results are interpreted together with age, family history and symptoms, and abnormal findings can lead to repeat testing, imaging such as MRI, or a biopsy.

Overview

The Prostate and Why It Changes With Age

The prostate is a walnut-sized gland that sits just below the bladder and in front of the rectum. It surrounds the urethra, the tube that carries urine from the bladder out through the penis, which is why prostate changes so often show up as urinary symptoms. Because the back of the gland lies against the rectal wall, a clinician can feel it during a rectal exam.

Prostate problems become much more common with age. Benign prostatic hyperplasia (BPH), a noncancerous enlargement of the gland, affects an estimated 5 to 6 percent of men ages 40 to 64 and 29 to 33 percent of men 65 and older [National Institute of Diabetes and Digestive and Kidney Diseases, n.d.-a]. Prostatitis, an inflammation of the gland that is often painful, is the most common urinary tract problem in men under 50 and the third most common in men over 50 [National Institute of Diabetes and Digestive and Kidney Diseases, n.d.-b]. Prostate cancer is the other major concern. The American Cancer Society estimates about 333,830 new cases and 36,320 deaths in the United States in 2026, with about 1 in 8 men diagnosed during their lifetime and an average age at diagnosis of about 68 [American Cancer Society, 2026].

There is no longer a single age at which every man should begin yearly prostate testing. Current guidance treats screening as a personal decision made with a health care provider, based on age, risk factors, overall health and how a man weighs the possible benefits and harms.

What Current Prostate Screening Guidelines Say

The U.S. Preventive Services Task Force (USPSTF) recommends that men aged 55 to 69 make an individual decision about PSA screening after discussing the benefits and harms with their clinician, and it recommends against PSA-based screening for men 70 and older [U.S. Preventive Services Task Force, 2018]. An update to that recommendation is in progress.

The American Urological Association (AUA) guideline, published in 2023 and amended in 2026, says clinicians may offer a baseline PSA test between ages 45 and 50 and should offer regular screening every 2 to 4 years to people aged 50 to 69 [American Urological Association, 2026]. For people at increased risk - including Black men, those with certain inherited (germline) gene mutations and those with a strong family history - it recommends starting screening at 40 to 45 [American Urological Association, 2026]. The guideline also allows the screening interval to be personalized, or screening to stop, based on age, PSA results, life expectancy and general health.

A PSA test can be ordered by a primary care provider as part of a regular checkup, and a urologist usually becomes involved when results or symptoms need further evaluation. For seniors and people living with disabilities or other serious health conditions, life expectancy and the practical burden of follow-up tests such as biopsy are a reasonable part of that conversation.

Male anatomy picture showing location of the prostate gland.

1 - Prostate-Specific Antigen (PSA) Blood Test

Prostate-specific antigen is a protein made by cells in the prostate gland. The PSA test is a simple blood test that measures how much of it is in the blood, and it is the main tool used in prostate cancer screening. The sample is sent to a laboratory for analysis. Our PSA levels chart and antigen explanation looks at results in more detail.

There is no single PSA level that separates a normal result from an abnormal one [National Cancer Institute, 2025]. In general, a level above 4.0 ng/mL has been treated as abnormal and may lead to a recommendation for biopsy, but some doctors use higher cutoffs for older men and lower ones for younger men [National Cancer Institute, 2025]. A raised PSA does not necessarily mean cancer. Only about 25 percent of men who have a biopsy because of an elevated PSA are found to have prostate cancer, and about 6 to 7 percent of men have a false-positive PSA result in any given screening round [National Cancer Institute, 2025].

Several things besides cancer can raise PSA, including BPH, prostatitis or infection, a recent prostate biopsy and, briefly, vigorous exercise such as cycling and ejaculation [National Cancer Institute, 2025]. MedlinePlus advises avoiding sex or masturbation for 24 hours before the test and notes that some medicines can affect results, so people should tell their provider what they take rather than stopping any medicine on their own [MedlinePlus, 2025].

If PSA is elevated, the usual next step is a repeat test and further evaluation. This may include a urinalysis, a review of medical and family history, a digital rectal exam, a post-void residual test and, in some cases, an MRI of the prostate, a cystoscopy or a biopsy. The AUA guideline says MRI may be used before a first biopsy to improve detection of clinically significant cancer [American Urological Association, 2026]. The PI-RADS score chart explains how prostate MRI findings are graded.

2 - Digital Rectal Exam (DRE)

A digital rectal exam is a physical exam in which a clinician inserts a gloved, lubricated finger into the lower rectum to feel the back of the prostate. It can reveal an enlarged gland, lumps, hard areas or tenderness, and if a lump is found, more tests may be recommended [National Cancer Institute, 2025]. The exam is usually done standing and bending forward or lying on one side, so people who use wheelchairs or have limited mobility can ask for the position that works best for them.

The role of the DRE in screening has changed. The USPSTF does not recommend DRE as a screening test because there is too little evidence that it helps [U.S. Preventive Services Task Force, 2018]. The AUA says clinicians may use DRE alongside PSA to help estimate the risk of clinically significant cancer, rather than as a stand-alone screen [American Urological Association, 2026]. The DRE is still useful when a man has urinary symptoms, because it helps doctors assess conditions such as BPH or prostatitis that a blood test alone cannot identify. See our comparison of the digital rectal exam vs. PSA test for more.

3 - Post-Void Residual (PVR) Test

For people who have trouble controlling urine or fully emptying the bladder, a doctor may also order a post-void residual test. It measures how much urine stays in the bladder after urinating. It is usually done with a quick bladder ultrasound scan, or by passing a thin catheter into the bladder to drain and measure the remaining urine [National Institute of Diabetes and Digestive and Kidney Diseases, n.d.-c]. A result of 100 to 150 milliliters or more means the bladder is not emptying completely [National Institute of Diabetes and Digestive and Kidney Diseases, n.d.-c].

This test helps evaluate:

• Urinary incontinence (accidental leakage of urine)
• Urinary retention and other problems with urination
• An enlarged prostate (benign prostatic hyperplasia, or BPH)

Our guide to enlarged prostate and BPH symptoms, tests and treatment covers the next steps after diagnosis, and men dealing with leakage may find male Kegel exercises helpful.

Talking With Your Doctor About Prostate Testing

Prostate screening decisions work best as a shared conversation. Useful topics include personal and family history, race and any known inherited gene mutations, what a PSA result would mean, and what follow-up might involve. Anyone with new urinary symptoms, blood in the urine or semen, or pelvic pain should see a health care provider regardless of screening plans. A routine male health check-up is a good time to raise the subject.

Frequently Asked Questions

Do I need to fast before a PSA blood test?

Fasting is not usually needed for a PSA test on its own, since it is a routine blood draw. Follow any instructions from your provider or the lab, especially if other blood tests that do require fasting are being taken at the same visit.

Is a digital rectal exam painful?

Most people find the exam brief and only mildly uncomfortable rather than painful. It usually lasts less than a minute, and some people feel pressure or a short urge to urinate. Telling the clinician about pain, anxiety or past trauma allows them to go slowly and explain each step.

Can an enlarged prostate turn into prostate cancer?

Benign prostatic hyperplasia is not cancer and is not caused by cancer. However, the two conditions are both common in older men, can exist at the same time, and can cause similar urinary symptoms, which is why doctors check carefully when symptoms appear.

Should I stop taking finasteride or dutasteride before a PSA test?

No, do not stop any prescribed medicine without talking to your provider. These drugs, often used for an enlarged prostate or hair loss, can lower PSA readings, so your doctor needs to know you take them in order to interpret the result correctly.

What is a free PSA test?

PSA in the blood is either attached to proteins or circulating freely. A free PSA test measures the share that is unattached, and a lower percentage of free PSA is linked to a higher chance of cancer. Doctors sometimes use it to help decide whether a biopsy is needed when the total PSA is borderline.

How is prostatitis treated?

Treatment depends on the type. Bacterial prostatitis is usually treated with antibiotics, while chronic prostatitis or chronic pelvic pain syndrome is often managed with a mix of approaches such as medicines to relax the bladder and prostate, pain relief, pelvic floor physical therapy and lifestyle changes.

How can a caregiver help someone prepare for a prostate exam?

Caregivers can help by writing down symptoms, medicines and family history ahead of time, arranging accessible transportation, and asking the clinic about exam tables, transfer help or positioning for someone with limited mobility. They can also help the person keep track of results and follow-up appointments.

What happens during a prostate biopsy?

A urologist uses a thin needle, guided by ultrasound and sometimes MRI images, to take small tissue samples from the prostate, either through the rectal wall or through the skin between the scrotum and anus. Local anesthesia is used, the procedure typically takes a short time, and the samples are examined in a lab for cancer cells.

References:

• American Cancer Society. (2026). Key statistics for prostate cancer.
• American Urological Association. (2026). Early detection of prostate cancer: AUA/SUO guideline (2023, amended 2026).
• MedlinePlus. (2025). Prostate-specific antigen (PSA) test. U.S. National Library of Medicine.
• National Cancer Institute. (2025). Prostate-specific antigen (PSA) test.
• National Institute of Diabetes and Digestive and Kidney Diseases. (n.d.-a). Enlarged prostate (benign prostatic hyperplasia).
• National Institute of Diabetes and Digestive and Kidney Diseases. (n.d.-b). Prostatitis: Inflammation of the prostate.
• National Institute of Diabetes and Digestive and Kidney Diseases. (n.d.-c). Urodynamic testing.
• U.S. Preventive Services Task Force. (2018). Prostate cancer: Screening - Final recommendation statement.

More on this topic: Prostate Cancer Publications - Male Health Publications - Aging Publications

Insights, Analysis, and Developments

Editorial Note: Prostate testing has become less about a fixed yearly routine and more about informed choice, and that shift matters because the stakes run in both directions. The American Cancer Society expects about 333,830 new prostate cancer diagnoses and 36,320 deaths in the United States in 2026, and roughly 1 in 8 men will be diagnosed in their lifetime, yet screening can also turn up slow-growing tumors that would never have caused harm. At the same time, noncancerous conditions such as BPH, which affects close to a third of men 65 and older, and prostatitis, the most common urinary tract problem in men under 50, often produce the same urinary symptoms. Tools such as prostate MRI before biopsy are helping doctors sort out which findings need action. For older men and people managing disabilities, the best approach is a frank talk with a trusted provider about personal risk, health priorities and what each result would actually lead to.

Author Credentials: Ian C. Langtree is a writer, editor, and the founder and Editor-in-Chief of Disabled World, which he established in 2004 as one of the longest-running independent resources for disability news and information. Over more than two decades, he has written and edited thousands of articles on disability rights, health, accessibility, and assistive technology. Drawing on a global perspective shaped by extensive travel and lived experience, Ian is a committed advocate of the Social Model of Disability, the framework developed by disabled activists in the 1970s that focuses on removing societal barriers rather than on individual impairments. His writing is grounded in that framework and in a lasting commitment to disability rights, accessibility, and social inclusion. To learn more about Ian's background, expertise, and accomplishments, visit his full biography.