Prostate Cancer: symptoms, causes, and treatment - MyHealth Symptoms Prostate cancer may cause no signs or symptoms in its early stages. Prostate cancer that's more advanced may cause signs and symptoms such as: Trouble urinating Decreased force in the stream of urine Blood in the urine Blood in the semen Bone pain Losing weight without trying Erectile dysfunction https://redcliffelabs.com/myhealth/lab-test/prostate-cancer-test/prostate-cancer-symptoms-causes-and-treatment/