Men's Health

PSA Test (Prostate-Specific Antigen)

Q: Should every man have a PSA test?

There is no simple yes or no: PSA screening is a personal decision made with your doctor, weighing the chance of catching cancer early against the risk of over-diagnosis. Men at higher risk (family history, Black ethnicity) may consider it earlier.

Q: Can I do anything before the test to get an accurate result?

Yes. Avoid ejaculation and vigorous cycling for a couple of days beforehand, and mention any recent urinary infection, as these can raise PSA temporarily.

Q: Does a normal PSA mean I definitely don't have prostate cancer?

No test is perfect; some prostate cancers occur with a normal PSA. Report any urinary symptoms to your doctor regardless of your PSA result.

Q: What is a normal PSA level?

It rises with age, so age-specific ranges are used: but the trend over time and the MRI findings often matter more than a single threshold.

PSA is a protein made by the prostate gland. A high PSA may indicate prostate problems, including prostate cancer, but a raised level does not automatically mean cancer. Here's what your result means.

Written and clinically reviewed by Suman Konda, PharmD, Clinical Pharmacist · Based on peer-reviewed sources · Editorial policy · Not medical advice

Last reviewed and updated: 01 August 2026 · How we check our content

What is a PSA test?

PSA (Prostate-Specific Antigen) is a protein produced by both normal and abnormal prostate cells. A small amount of PSA normally leaks into the bloodstream. The PSA test measures this level. Elevated PSA can be caused by prostate cancer, benign prostatic hyperplasia (BPH: non-cancerous enlargement, very common in older men), prostatitis (prostate infection/inflammation), recent prostate exam or biopsy, or ejaculation within 48 hours of the test. PSA alone cannot diagnose cancer. It is a screening flag, not a definitive test.

PSA Normal Range by Age

Age Group	PSA Upper Limit (ng/mL)
40 – 49 years	< 2.5
50 – 59 years	< 3.5
60 – 69 years	< 4.5
70 – 79 years	< 6.5
General cutoff (most labs)	< 4.0

What does HIGH PSA mean?

HIGH PSA above age-adjusted normal

A raised PSA needs to be interpreted carefully. Most men with a PSA between 4–10 ng/mL do NOT have prostate cancer: only about 25% will. Common causes of high PSA: benign prostate enlargement (BPH), prostate infection (prostatitis), recent prostate biopsy or digital rectal exam, recent ejaculation, urinary tract infection. Your doctor will consider your age, symptoms (difficulty urinating, weak stream, frequent urination), PSA velocity (how fast it's rising) and digital rectal exam (DRE) before recommending a biopsy. PSA above 10 ng/mL has a higher cancer probability (~50%) and usually warrants a biopsy.

Free PSA vs Total PSA

Free PSA ratio helps distinguish cancer from BPH

PSA exists in two forms in the blood: free PSA and PSA bound to proteins. The Free PSA % = (Free PSA ÷ Total PSA) × 100. A higher free PSA % suggests BPH (non-cancerous). A lower free PSA % (under 10–15%) suggests higher cancer risk. Doctors use the free PSA ratio to decide whether a biopsy is needed when total PSA is borderline (4–10 ng/mL).

Questions to ask your doctor

Is my high PSA more likely BPH, prostatitis or cancer based on my symptoms?
Should I check free PSA ratio?
Do I need an MRI (mpMRI) of the prostate before considering biopsy?
How often should I recheck PSA if I'm not having a biopsy?

What PSA is and why it is measured

PSA (prostate-specific antigen) is a protein made by the prostate gland. A small amount normally circulates in the blood, but levels can rise with prostate cancer: as well as with several benign conditions. It is used to help detect prostate cancer, to assess urinary symptoms, and to monitor men already diagnosed or treated.

Because PSA is not cancer-specific, a raised level does not confirm cancer, and a normal level does not entirely exclude it. This is why PSA testing is a shared decision, weighing its benefits against the risk of unnecessary anxiety and investigation.

Benign causes of a raised PSA

Several non-cancerous factors raise PSA, including benign prostate enlargement (very common with age), prostate infection or inflammation (prostatitis), recent ejaculation, vigorous exercise such as cycling, and urinary catheters or procedures.

For this reason, a single raised PSA is often repeated after avoiding these factors, rather than acted on immediately. Age-adjusted reference ranges are also used, as PSA naturally rises with age.

What happens if PSA is high

If PSA is persistently raised, the modern pathway usually involves an MRI scan of the prostate before deciding whether a biopsy is needed: this helps avoid unnecessary biopsies. If cancer is found, further tests grade and stage it to guide whether active surveillance or treatment is best.

Many prostate cancers detected this way are slow-growing and may never cause harm, which is why not every raised PSA leads to aggressive treatment.

Frequently Asked Questions

Should every man have a PSA test?