It can also be due to injury, infection (Epididymitis or Orchitis) or inflammation, testicular torsion( most common in young
men), excessive bicycle riding, hernia,varicocele or
kidney or ureteric
stones. As there is no swelling or inflammation or redness of the scrotal sacs, so the chances of epidiymitis or orchitis are rare. In cases of hernia, a prominent bulge along with testicular pain is there and in cases of kidney or ureteric stones, pain during micturition may also be there.