Is what happened to the testicle an ابتلاء (tribulation) or بلاء (affliction), or a worldly punishment that necessitates an otherworldly punishment, or is it a normal matter?

Testicular atrophy is an affliction that may be a punishment and a reminder to stop a bad habit. A Muslim must repent and make good use of Allah's blessings, such as health and free time. Divine punishments in this world expiate sins, and repentance erases what came before it.