SN instructed patient on s/s of prostate cancer. While most prostate cancer does not cause any symptoms at all, the symptoms and signs of prostate cancer may include: frequent urination, weak or interrupted urine flow or the need to strain to empty the bladder, the urge to urinate frequently at night, blood in the urine, new onset of erectile dysfunction, pain or burning during urination, which is much less common and discomfort or pain when sitting, caused by an enlarged prostate.