After sexual intercourse, one of my testicals often start to have discompfort and pain and becomes almost hard to the touch compared to the other testical. The pain last for a few hours and then goes away by the next day and the testical goes back to the normal feeling of the other testical. A side note, I usually use Tri Mix injections because I sometime suffer from eractal disfunction. The testical doesn t have pain other than after having sex.