Prostate cancer is the most common cancer in men — roughly one in eight will develop it at some point. Awareness campaigns remind us of this constantly, yet most men still don’t know how to actually recognize the signs themselves, or that the most common “sign” might be no sign at all. Here’s a rundown of what actually shows up, and why the absence of symptoms doesn’t mean the absence of disease. (Based on the insights of Associate Professor Charles Chabert, a urologist.)
Key Takeaways
- The most common presentation of prostate cancer is no symptoms at all — cancer growing in a quiet part of the gland doesn’t press on anything nearby.
- Bone pain is a rare but serious sign, usually indicating the cancer has already spread — worth checking if persistent and unexplained, especially in older men.
- Urinary symptoms and erectile dysfunction are more commonly caused by benign, age-related changes than by cancer, but shouldn’t be ignored.
- Screening focuses on higher-risk groups — Black men, men over 55, and those with a strong family history — using the imperfect PSA blood test.
- Autopsy studies show many older men have undiagnosed, harmless prostate cancer — it’s often “the cancer you die with, not the cancer you die from.”
Bone Pain (Uncommon, but Serious)
This is relatively uncommon as a first sign, but it’s the most concerning when it does happen. Prostate cancer that has already spread often moves to bone, and in rare cases, persistent bone pain — like an unrelenting backache — can be the only symptom present. This is genuinely rare as an initial presentation, but older men with ongoing, unexplained bony pain that won’t resolve should get it checked with a doctor, since occasionally that’s the only clue available.
Blood in Urine or Semen
This symptom tends to get attention because it’s alarming, which is arguably a good thing — it drives people to seek care quickly. The reassuring part: blood in urine or semen is far more likely to be caused by something other than prostate cancer. Still, it shouldn’t be ignored, since it can be one of the ways prostate cancer presents.
Erectile Dysfunction
ED has many possible causes — medications, age, stress, cardiovascular issues — and prostate cancer is only one of them. The challenge is that most men simply ignore erectile dysfunction, whether from embarrassment or an assumption it’s just a normal part of aging. It can be genuinely difficult to distinguish ordinary age-related changes from something worth investigating, which is exactly why it’s worth mentioning to a doctor rather than assuming.
Urinary Symptoms
Frequent urination, waking at night to urinate, a weak stream, difficulty starting, or dribbling afterward are commonly associated with prostate issues. Most of the time, these symptoms trace back to the prostate simply enlarging with age (benign prostatic hyperplasia) rather than cancer — though cancer can cause these symptoms too, particularly if it grows toward the urethra and narrows it.
The Most Common Symptom: No Symptoms at All
This is genuinely the most common way prostate cancer presents. It makes sense once you understand where cancer tends to start: often in a quiet region of the prostate gland, away from the urethra and other structures. Cancer growing there doesn’t press on anything, so it causes no pain and no urinary symptoms. If it grows toward the urethra, it can cause urinary narrowing; if it spreads beyond the gland, it causes symptoms wherever it lands — like bone pain. But early on, in its original location, it’s frequently silent. The absence of symptoms simply doesn’t mean the absence of disease.
So How Do We Actually Catch It?
Since symptoms often can’t be relied upon, screening focuses on identifying higher-risk groups and monitoring them more closely — specifically Black men, men over 55, and men with a strong family history of prostate cancer. For these groups, the PSA blood test is the primary screening tool used. It isn’t perfect: it can miss cancers, and it can also flag an elevated result when cancer isn’t actually present, leading to unnecessary anxiety and follow-up testing. Symptoms remain the backup system — if something changes, that’s the signal to see a doctor.
Why “No Symptoms” Doesn’t Always Mean Danger, Either
Interestingly, autopsy studies of older men have found that up to half had prostate cancer they were never aware of, and it never caused them harm — earning prostate cancer the description “the cancer you die with, not the cancer you die from” in many cases. The more aggressive prostate cancers do tend to grow faster and are more likely to eventually cause noticeable symptoms. Still, PSA testing’s imperfections — missing real cancers while also flagging some that would never have caused harm — are a genuine, acknowledged limitation of current