prostate blood test explained

Overview

The prostate blood test (also called a PSA test) measures the level of prostate-specific antigen (PSA) in your blood. PSA is a protein made by the prostate gland. High levels can be a sign of prostate cancer, but they can also be caused by other conditions such as an enlarged prostate or an infection. This test is a screening tool, not a final diagnosis.

Yes, the PSA test is commonly offered to men over 50 as part of routine health checks, especially if they have risk factors such as a family history of prostate cancer.

The test is for men, typically starting around age 50. Men with a higher risk—such as those of African-Caribbean descent or with a close relative who had prostate cancer—might be offered the test earlier.

Symptoms

Common symptoms

• Frequent urination, especially at night
• Difficulty starting or stopping urination
• Weak urine flow or feeling that your bladder is not empty
• Pain or burning when urinating
• Blood in urine or semen

Symptoms in older adults

• The same symptoms as above, but older men are more likely to have an enlarged prostate that can cause these issues

Causes

Main causes

• Prostate cancer (the test helps detect it early)
• Benign prostatic hyperplasia (BPH) – a non-cancerous enlargement of the prostate
• Prostatitis – inflammation or infection of the prostate
• Recent medical procedures (such as a biopsy or catheter) can temporarily raise PSA

Risk factors

• Age (risk increases after 50)
• Family history of prostate cancer (father, brother, son)
• Ethnicity (African-Caribbean men have a higher risk)
• Obesity

When to see a doctor

See a doctor urgently if:

• Any of the emergency symptoms listed above
• Sudden inability to urinate

Book a routine appointment if:

• If you are aged 50 or older and want to discuss screening with your doctor
• If you have a family history of prostate cancer and are concerned
• If you have any urinary symptoms that bother you

Diagnosis

The PSA blood test is the first step. If your PSA level is high, your doctor will likely recommend further tests to find out the cause.

Tests that may be done

• PSA blood test (the main screening test)
• Digital rectal exam (DRE) – a physical exam of the prostate
• MRI scan of the prostate (to get a detailed image)
• Prostate biopsy (taking a small tissue sample to check for cancer cells)

What to expect at your appointment

A blood sample is taken from your arm, similar to any other blood test. Results usually come back within a few days. If further tests are needed, your doctor will explain each step and what it involves.

Treatment

If the PSA test and follow-up exams find a condition that needs treatment, the options will depend on the specific diagnosis—whether it's cancer, BPH, or prostatitis. Your healthcare team will tailor a plan for you.

Self-care at home

• Stay active and maintain a healthy weight
• Eat a balanced diet with plenty of fruits and vegetables
• Limit alcohol and avoid smoking

Medical treatments

For an enlarged prostate (BPH), treatments may include lifestyle changes, medications to relax the prostate or shrink it, or minimally invasive procedures. For prostatitis, antibiotics and anti-inflammatory medicines are often used. For prostate cancer, options may include active surveillance (monitoring without immediate treatment), surgery to remove the prostate, radiation therapy, hormone therapy, or chemotherapy. Your doctor will discuss the best approach based on your situation.

When is surgery considered?

Surgery may be considered for BPH if symptoms are severe or medicines don't help. For prostate cancer, surgery is one option if the cancer is confined to the prostate. The decision depends on factors like your age, overall health, and the stage of cancer.

Living with this condition

If you have a prostate condition, you may need to manage urinary symptoms. This can include timed voiding, pelvic floor exercises, and limiting caffeine or alcohol. Regular follow-up with your doctor is important.

Lifestyle tips

• Stay physically active (walking, swimming, or gentle exercise)
• Drink plenty of water, but avoid drinking too much before bedtime
• Manage stress through relaxation techniques or hobbies

Diet and exercise

A diet rich in fruits, vegetables, and whole grains may help overall prostate health. Limit red and processed meats. Exercise can help maintain a healthy weight and reduce symptoms.

Mental health and emotional wellbeing

Worrying about test results or a prostate condition can affect your mood. It's normal to feel anxious. Talk to your healthcare provider about these feelings—they can offer support or refer you to a counsellor.

Prevention

There is no guaranteed way to prevent prostate cancer or BPH, but a healthy lifestyle may reduce your risk. Some studies suggest that a diet low in fat and high in vegetables may be beneficial.

Screening programmes

The PSA test is a screening tool, but it's not perfect. Discuss with your doctor whether screening is right for you, especially if you have risk factors. Screening is typically offered from age 50, or earlier for higher-risk groups.

Complications

If left untreated

• If prostate cancer is not treated, it can spread to other parts of the body (metastasize), which can be harder to treat.
• Untreated BPH can lead to bladder damage, kidney problems, or urinary tract infections.
• Chronic prostatitis can cause ongoing pain and discomfort.

Long-term outlook

Most prostate conditions are treatable, and when caught early, prostate cancer has a very good outlook. Many men live full, active lives after treatment. Your healthcare team will help you understand your specific situation and the best path forward.

Find support

Local organisations

• Your local health service or GP surgery · Global

External links open third-party websites. Ruqelo Health is not responsible for external content. Listing an organisation does not imply endorsement.