Good points, everyone!
I have a friend who will ask ("out of the blue") things like, "I would guess with this weather, your fibro is really bad. How are you doing?" I'm always surprised she remembers and asks, and find it thoughtful. I think because she has ulcerative colitis, she can relate to chronic illness. I try to remember to ask her how she is, too! She's always been a thoughtful, giving person.
But isn't it true: There are many (most) people who really aren't interested and/or don't have any idea what we go through. Yes--better to say nothing. This even occurred to me before I emailed my relative and said I wouldn't be able to stop by. But knowing her and her many questions (tends to pry a bit), I thought I'd just 'get it over with' and tell her the reason why.
Even so, in the future, with this individual, I think I'll just say nothing. Looking back at my 'sent emails' I see that I had briefly explained in my first email why I wouldn't be stopping by. Yet, she had to respond with the "me, too" auto response she always gives. This makes me even more determined to never "go there" in discussion with her again. Lesson learned!
Fish, you nailed it: Thank heavens for this forum!!
Very thankful for all of you.