Jitter

Jitteriness is a symptom of anxiety, stress, or nervousness. It is characterized by an inability to sit still and an excessive amount of movement, such as trembling, shaking, tapping, or jerking. It can also manifest as restlessness, agitation, or an inability to focus. It usually develops gradually, but can also occur suddenly. It can be accompanied by other symptoms such as sweating, rapid heart rate, and difficulty breathing.