About 6 months ago I noticed that my wife, who just turned 50 in January, starting making a low, but noticeable humming sound when exhaling. It has become more pronounced recently so that other people have noticed it as well. It usually happens when she is standing or sitting still. She does not notice it and when it is brought to her attention, it stops.
She is very resistant to my suggestion to see a neurologist.
Also, I started noticing last week that she often, unconsciously, taps her hand (or foot if standing) when she becomes engaged in a conversation.
Furthermore, for the past several months I believe that she has been becoming forgetful.
My wife dismisses my concerns and attributes it all to peri-menopause.
How concerned should I be and what else, if anything, should I be on the look-out for?