For a week I've had dull mild pain in my right testicle on and off. I went to an urologist - he did a physical exam and ultrasound and said things looked normal. Told me to do a urine and semen test. Both came back normal - no bacteria. I'm wondering what could be the cause for this pain. I have kidney stones, but I've had many stones in the past none of which caused testicle pain. The doctor said it might be something with the blood flow and prescribed hidrosmin. This seemed odd. Is it possible that the urologist didn't read the ultrasound correctly and a second examination would be appropriate? What other tests would be in order and what else could be causing this?