ترس و لرز fear and trembling

It is caused by the body's stress response, which triggers the release of hormones such as cortisol and adrenaline. This increases physical tension and contributes to shaking and trembling.

Fear is an unpleasant subjective emotional state arising in response to perceived dangers or threats and which, when experienced, is typically associated with physiological and psychological changes. These changes frequently lead to behavioral reactions such as fight-or-flight responses or, in extreme cases, immobilization (freeze response). Unlike most (perhaps all) other animals, humans can experience fear in response to a present or anticipated stimulus and to imagined events.