Grumpy husband - is it just old age?

As we age, like it or not, we lose confidence to a degree, which varies from person to person. So we become querulous, to some extent, and probably less tolerant.

Glad that the GP has found a cause for the unhappiness, and can effect an improvement, if not, ideally, a cure

Hi,

SOrry to hear that.
I had one of those and again form time to time, discovered he had type 2 Diabetes. I still have to turn a deaf ear some of the time but when he got treatment he got better.

Good luck