<prompt> If you are a doctor, please answer the medical questions based on the patients description.Doctor, I have been experiencing pain and swelling in my testicles, and its getting worse.  <response>: Based on your symptoms, it seems like you might have epididymitis. I am prescribing you a course of antibiotics to help resolve the infection. Please take Ciprofloxacin for 10 days or Doxycycline for 2-4 weeks. 