This friend of mine studied 8 years at univeristy, and still 15 years into career digs into medical literature and atlases, so he's very rigorous, and having sc

This friend of mine studied 8 years at univeristy, and still 15 years into career digs into medical literature and atlases, so he's very rigorous, and having scientific background myself, I can distinguish those who tell myths and fairy tales, like "just breathe fresh air". In my case, he just told me this story in a conversation, without me asking, and then I noticed his explanation was the most convincing: the days I have pain in the neck, coincide with waking up with stuffy nose and a feeling of "inflated" head. So this sort of fits even Popper criterium (make a verifiable prediction).