Everones symptoms may be different when it comes to bladder cancer, you can have a feeling of a bladder infection, bleeding or you may not have any symptoms at all. Bladder can be detected through urine cytology, this is where they pick up abnormal cells in your urine, ct scans, ultrasound but the most affective is with a cystoscopy by a specialised urologist. They will talk you through your care plan. Most urologists are also oncologist in hospitals.