Nervousness is where you are easily alarmed or on edge about something. A nervous person can seem paranoid or like they are very uneasy about something. They can be sweating, trembling or their heart rate could be increased causing them to breathe more heavily. Often, someone who is nervous will experience a sense of danger, or panic. A nervous person can also have trouble concentration on a simple task or can have trouble thinking about anything other than the worry.
If you are feeling nervous, your body may stiffen, making you appear glued to the spot. On a micro-expression level, when we experience nervousness our facial nerves tend to take on a frozen 'deer in the headlights' appearance. Your listeners may pick up that you are tense and perceive this as a lack of confidence.
