Experiencing Pain from Propecia Use

Hi Dr.Rassman
I am a 20 years old guy. I have a bad family history with hair loss. The same thing happend to me 1 year ago. I decided to take propecia 2 weeks ago. The problem is that in the first 5 days i had testicular pain.Than it was better and better and now i dont have it anymore. I asked my doctor,but he didn’t tell me why it was happening.Can you tell me why did it happen to me?
Thank you for your time.

I am not familiar with testicular pain from Propecia. It is not a known side effect and I have had no patients report such a problem to me, despite the many patients who I have prescribed this drug to.