A.L.
hello
believe it or not... and some won't, some men can experience ANDROPAUSE.... yes, night sweats.. which of course, needn't just happen at night, however they are caused by a fluctuation in male hormones.. It isn't uncommon for men to experience hormone fluctuations throughtout life just as women do, but there isn't as much attention given to males on the topic.
For the heck of it, why not have your husband get some blood work done to make sure nothing is lurking in the bloodstream that shouldn't be. Additionally, keep in mind.. also good to get his thyroid checked.. matter a fact, when is the last time he had a fullblown physical.. some doctors (not all) sometimes blow off things that they themselves don't understand..
I would get more doctor opinions..
best of luck