BPH vs. Prostate Cancer: How Symptoms Differ

What is BPH, and who does it affect?

Benign prostatic hyperplasia is a non-cancerous enlargement of the prostate gland that occurs naturally as men age. The prostate sits just below the bladder and surrounds the urethra, so as it grows, it can squeeze the urethra and affect urinary flow. BPH is not cancer and does not increase the risk of prostate cancer — the word "benign" here means it is not malignant.

BPH is extremely common. It becomes increasingly prevalent with age, affecting an estimated 5–6% of men ages 40–64 and 29–33% of men ages 65 and older. 3Ref 3National Institute of Diabetes and Digestive and Kidney Diseases (2024).Enlarged Prostate (Benign Prostatic Hyperplasia).BPH prevalence statistics (5–6% of men ages 40–64, 29–33% of men ages 65+), symptom characterization, risk factors, and treatment options Having BPH does not put you at higher cancer risk, but the two conditions can coexist.

What symptoms does BPH cause?

The symptoms of BPH are grouped as lower urinary tract symptoms (LUTS) and include:

• Weak or slow urinary stream
• Difficulty starting urination (hesitancy)
• A sensation that the bladder is not fully empty after urinating
• Dribbling at the end of urination
• Frequent urination — needing to go more than eight times a day
• Nocturia — waking up one or more times at night to urinate
• Urgency — a sudden, strong need to urinate that is hard to delay

Symptoms vary from person to person. Some men with a significantly enlarged prostate have mild symptoms, while others with moderate enlargement have substantial bother 1Ref 1Lerner LB, McVary KT, Barry MJ, et al. (2021).Management of Lower Urinary Tract Symptoms Attributed to Benign Prostatic Hyperplasia: AUA Guideline Part I — Initial Work-up and Medical Management.BPH symptom characterization (LUTS), prevalence, diagnosis, and treatment options.

What symptoms does prostate cancer cause?

Here is where things become complicated: early-stage prostate cancer — the most treatable stage — often causes no symptoms at all. The urinary symptoms that most men associate with prostate cancer are actually more characteristic of BPH.

When prostate cancer does cause symptoms, they can overlap considerably with BPH: weak stream, urgency, frequency. Additional symptoms that are more concerning for advanced cancer (though not exclusively) include:

• Blood in the urine or semen
• Pain or burning with urination that is new and unexplained
• Pain in the lower back, hips, or pelvis that persists — a potential sign of cancer that has spread to bone
• Unexplained weight loss or fatigue

The important takeaway: most men with early prostate cancer have no symptoms. Screening, not symptom evaluation, is what detects it at a curable stage.

How are BPH and prostate cancer diagnosed?

Neither condition can be diagnosed by symptoms alone. A urologist's evaluation typically includes:

Digital rectal exam (DRE): The clinician palpates the prostate through the rectal wall to assess its size and texture. A smooth, symmetrically enlarged prostate is more consistent with BPH. Nodularity, firmness, or asymmetry raises concern for cancer.

PSA blood test: Prostate-specific antigen is a protein produced by the prostate. An elevated PSA can result from BPH, prostatitis, or cancer — it is not cancer-specific. Guidelines from the American Urological Association and others support shared decision-making around PSA screening for men aged 45–75, with individual risk factors (family history, Black race) affecting the recommended age to begin 2Ref 2Wei JT, Barocas D, Carlsson S, et al. (2023).Early Detection of Prostate Cancer: AUA/SUO Guideline Part I: Prostate Cancer Screening.PSA screening recommendations, shared decision-making, and risk stratification for prostate cancer early detection.

Biopsy: If PSA or exam findings are concerning, a prostate biopsy is the only definitive way to diagnose prostate cancer.

Imaging: MRI and other imaging help characterize suspicious areas and guide biopsy decisions.

Can BPH turn into prostate cancer?

No. BPH does not transform into cancer. They are two separate conditions that happen to affect the same gland. However, because they can coexist, a man with known BPH should still follow appropriate screening recommendations rather than assuming his urinary symptoms are explained by BPH alone.

When should I see a urologist?

See a urologist — the right specialist for prostate conditions — if you experience:

• Bothersome urinary symptoms that interfere with your daily life or sleep
• Blood in the urine or semen
• Inability to urinate at all (urinary retention — this is a medical emergency)
• Pelvic, back, or hip pain of unclear cause
• A family history of prostate cancer, particularly in a first-degree relative
• Questions about PSA screening and what the results mean for you

Claúdia can help you prepare for a urology visit and discuss what to expect from the evaluation.