Dr. is testing for bladder cancer but i do not want it to hurt. it this possible?

Yes: There are anesthetics that can be used and meds prior to invasive testing to keep discomfort at a bare minimum for most people.

Bladder cancer: The definitive test for identifying bladder cancer is cystoscopy. This involves passing a thin flexible fiberoptic scope through the urethra and into the bladder for a look around. Local anesthetic is applied inside the urethra and the discomfort is actually quite minimal in males as well as females. It is typically done in the office.