The three common prostate problems at a glance

The prostate is a gland below the bladder that surrounds part of the urethra. Because urine passes through this region, different conditions can produce similar urinary changes. The comparison below describes tendencies; none of the symptom patterns establishes a diagnosis. NIDDK

Sources: NIDDK Prostate Problems; NCI Understanding Prostate Changes.

1. Benign prostatic hyperplasia (BPH)

BPH means the prostate has grown larger for a reason other than cancer. As tissue presses on the urethra, the bladder may need to work harder to push urine out. It is the most common prostate problem in men older than 50, according to the NIDDK. Age and family history are among the factors associated with BPH, but scientists have not identified a single cause. NIDDK

Possible symptoms include difficulty starting, a weak or interrupted stream, dribbling, urgency, frequent urination, and waking to urinate. These symptoms are not proportional to gland size: a relatively large prostate can cause little trouble, and a slightly enlarged one can cause more. A symptom assessment is more useful than assuming that a number on a scan tells the whole story. NIDDK

Treatment depends on symptom burden and complications. A clinician might recommend monitoring, practical symptom changes, medicines, or procedures. Improvement in urine flow is different from physically reducing prostate volume; the approach depends on the individual situation. NIDDK

2. Prostatitis

Prostatitis refers to inflammation of the prostate and sometimes nearby areas. It can affect men at different ages. The term covers several conditions: bacterial prostatitis involves an infection, while chronic prostatitis/chronic pelvic pain syndrome can involve persistent pain without a bacterial infection being found. These are different problems and need different clinical approaches. NIDDK · NCI

Chronic symptoms may include discomfort in the pelvis, between the scrotum and anus, in the genitals or lower back, sometimes together with urinary frequency or pain. Acute bacterial prostatitis can start abruptly with fever, chills, body aches and painful or difficult urination. Fever with new urinary or pelvic symptoms needs prompt medical assessment. Do not assume that all pelvic pain requires antibiotics or that it will resolve with a prostate supplement. NIDDK · NCI

3. Prostate cancer

Prostate cancer is not the same condition as BPH or prostatitis. According to the NCI, BPH and prostatitis do not themselves increase a man's risk of prostate cancer. Age is a separate risk factor, and family history and some inherited factors can also matter. Some men have higher risk and may need a more individualized discussion with their clinician. NCI · CDC

Early prostate cancer usually has no symptoms. If symptoms occur, they may include urinary changes or persistent pain, but these can also result from other conditions. Neither feeling well nor having urinary symptoms by itself answers whether cancer is present. NCI · CDC

A PSA blood test may be used in screening or diagnostic evaluation, but a high PSA can have noncancerous causes. Screening involves potential benefits and harms; the right decision depends on risk factors and preferences discussed with a clinician. If testing raises concern, a clinician explains whether follow-up tests, imaging or biopsy are appropriate. NCI

Why a weak stream or nighttime urination does not identify the cause

Urinary symptoms describe what is happening, not necessarily where the cause is. Weak flow, frequent urination or urgency can occur with BPH, but bladder problems, urinary tract infections and prostatitis can also be involved. Pain or fever changes the urgency of an evaluation, though even these symptoms do not allow a reliable self-diagnosis. NIDDK

How do clinicians tell these conditions apart?

The first steps commonly include a conversation about symptoms, medical and family history, current medicines, and a physical exam. Depending on the situation, a clinician may order urinalysis to look for infection or blood, consider PSA testing, or use tests of urine flow or imaging. A digital rectal exam can give a general impression of the prostate, but it is not a definitive diagnosis by itself. NIDDK · NCI

Tests answer different questions. Urinalysis may look for infection; a PSA level requires interpretation because benign conditions can raise it; imaging may show size or other features; and a biopsy can establish whether cancer cells are present when indicated. The appropriate sequence depends on the reason you are being evaluated. NIDDK

When should you seek medical care?

Arrange an appointment for a new or persistent weak stream, trouble starting, frequent or urgent urination, repeated nighttime waking, pelvic discomfort, or painful urination. These changes deserve assessment even if you suspect age-related BPH. NIDDK

Common questions

Can an enlarged prostate turn into cancer?

BPH is a noncancerous condition, and NCI states that having BPH does not increase prostate cancer risk. A person can still develop cancer independently, which is why concerns about risk or testing should be discussed separately. NCI

Can prostatitis happen without an infection?

Yes. Not all types are caused by bacteria. Chronic prostatitis/chronic pelvic pain syndrome can cause ongoing discomfort without a bacterial infection being found. Evaluation matters because treatment varies by type. NIDDK

Does a normal urine stream rule out prostate cancer?

No. Early prostate cancer commonly has no symptoms. Discuss screening decisions based on your individual risk and preferences rather than treating symptoms as a screening test. NCI