Why does prostate cancer cause blood in urine?

The prostate sits beneath the bladder and surrounds the tube that carries urine out of the body. A cancer within the gland may disturb delicate blood vessels or extend toward nearby urinary structures, allowing blood to enter the urine. Blood in Urine is a common presentation of Prostate Cancer, but blood may also have causes unrelated to cancer, including infection, stones, injury, or non-cancerous prostate enlargement. The urine may look pink, red, brown, or normal-looking when blood is only found on testing.

Arrange a medical assessment for any blood you can see in the urine, even if it disappears or occurs without pain. A clinician may ask about urinary changes, medicines, smoking history, pain, fever, and previous prostate problems. Assessment can include a urine test, examination, blood tests, and tests chosen to look at the bladder, kidneys, and prostate. Bring a list of medicines, especially those that can affect bleeding, and note when the colour change began.

Seek urgent care if you cannot pass urine, pass large clots, have heavy bleeding, develop severe lower abdominal or back pain, feel faint, or have fever with urinary symptoms. These features can signal blockage, significant bleeding, infection, or another problem needing prompt treatment. Do not wait for a routine appointment if the urine flow stops.

Ask what tests are needed to identify the source of bleeding, whether your current medicines could contribute, and which symptoms should prompt urgent review. If prostate cancer is already diagnosed, ask whether the bleeding could relate to the cancer, its treatment, or a separate urinary condition.