If any of us wore something skimpy or short we were warned that we'd get ' a chill in the kidneys'. Can't think of anyone who did actually ever have this diagnosis!
My grandmother used to talk about the blood "overheating" and causing all sorts of complaints. And I am convinced that her "rheumatics" and those of my mother, were the arthritis that I have (well, not at the moment
I think poor circulation is an actual condition, but will leave our resident medics to verify that!
How many disorders can you think of which no longer exist? Like chills, rheumatism, growing pains, weak chests? My hands keep going purple and people say it's "bad circulation" but can that be a real condition? Either your blood is circulating and you're alive, or it isn't and you're dead.