I found this interesting article:
Why Do We Sigh? | Psychology Today
My question: Should a first-person character tell us they sighed?
Sighing is an audible and visual reaction. But maybe a first-person character would only observe this in others. Would a first-person character just express the frustration in dialogue (internal and audible) and in physical actions?
I’d love feedback on this from fiction writers and those who read fiction.
Phyllis A. Still 
I think the POV character can sigh once in a while. The character can feel his own sigh and hear it as well, but we shouldn’t use it as a dialogue tag. People can’t sigh words. So if the writer is going to have the character sigh, it should be done in a beat or narrative.
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