Hi, I am 48, 115kgs and generally in good heath, however 4 weeks ago my scrotum swelled up to the size of a softball (probably 15cm in diameter) and the skin became very thick (after flu like symptoms).   I have been on 4 types of antibiotics.   The size has decreased a little bit, mabey 30% less but the skin is still very thick.
What you have experienced is an Epididymis and Testes infection and the good news is that the pain comes down fairly soon, but the bad news is the swelling will persist for a fairly long time and the size may never reach normal even after the infection has completely subsided. The common source of this infection is the urinary tract and I suggest you make sure this does not happen again as it is likely to do by ruling our any urinary obstruction. Ensure your blood glucose levels ate normal and urine does not show any pus cells