Where did this come from? Just curious really. I've not seen it written down anywhere or heard it given as advice.
Only place I have heard it is on MN. Am asking because I mentioned it on a zoom chat with friends, several of whom are medics. It raised eyebrows to say the least.
One even said the Italians sent people home if their o2 levels were 92% or above, commenting that she would be concerned at that level (No reference for that anecdote, sorry).
So my question is:
(a) is the blue lips thing something you heard from a friend/read on MN/read on SM; or
(b) is it something you were told by a medical professional.
Totally unscientific poll!