How to Read Anxiety in a Person's Body Language Physical signs.
More subtle cues.
These are general signs of stress, linked here to anxiety, but not necessarily specific just to anxiety.
Some are... Limits. Signs of Stress. In business, signs of stress that people express non-verbally delivers an important insight into how a person really feels about the situation at hand or what is being discussed.
Other cues are more indicative of the mental state and less obvious without looking for them.