Welcome to HCM
We understand your concerns.
The description you gave is not enough for a proper diagnosis. But on the out line, the problems seems to be psychological.
Ass your suggestion holds, he is healthy, vital, without any physical prblems and without any bad habits. I don't see any relationship with bilateral hernia repair
Talk to him about this. There may be some underlying worry about age or health related factors. He will recover soon. Don't worry.