how do u know if someones stressed if they are stood still and not giving you a reaction

Question: how do u know if someones stressed if they are stood still and not giving you a reaction
- Keywords:
  reaction,
  stress
Asked by MUSHY PEAS/SLUG to Georgina on 13 Nov 2017.
- Georgina Hazell answered on 13 Nov 2017:
  
  Firstly loving the name.
  
  Secondly – I’m not sure I know the answer to this. But at a guess – if you know the person well and they don’t normally behave in this way, then you would guess there was something wrong. Similarly if you measured their blood cortisol levels (if in a hospital environment) then that would indicate whether or not they were having a stress response.

Question: how do u know if someones stressed if they are stood still and not giving you a reaction