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.