I am not sure if there is an actual term for this as I have always called it that, but I’m basically asking what is the main gesture(s) you do that lets people around you know that you are experiencing some form of anxiety.
Mine is fiddling with my hands and fingers: i.e. squeezing my fingertips or hands or just clasping my them together. If I am really anxious I will pinch or squeeze my arms. Sometimes I may entangle my fingers together but that’s when my anxiety is low.