Why my body starts shivering and mind becomes upset when I face the audience?

You, my dear friend, might have a fear of public speaking. This fear is most widely felt and majority have or do face it. Id recommend facing your fear But step-by-step. Start small by giving a speetch to some of your closest friends and move up there, But dont move on to the next stage untill your comfortable with the last one.

It's stage fear and it's completely normal. Perhaps you are bothered because you are new to it. But I would say, even the professionals face nervousness while going on stage, but as they tend to curb it since are used to all this. Just be confident when speaking or performing..

You are experiencing the sympathetic nervous system so focus on your breathing for a while to stimulate the parasympathetic/relaxed state.

In my experience it's because we're self conscious and afraid or failure or embarrassment. They anxiety of it induces a fight or flight mechanism adrenaline starts pumping and our bodies can't handle it very well especially while trying to stay composed in fear of that failure. It brings about mental and physical stress.

Do you have anxiety when it comes to speaking (or performing) in public? A lot of us have a fear of public speaking (perhaps, because we are afraid of being judged and scrutinized by a large group of people). It helps to constantly practice or rehearse by yourself before moving onto a small group of friends/family members (who are willing to provide you with honest feedback and support) and eventually, to a large audience of strangers. The more practice you have, the more confident that you may feel once you are onstage.

Maybe you have anxiety. It is recommended to seek a psychologist if that is bothering you often or has manifested recently.

Because in our mind we begin to imagine that the people sitting right in front of us are either judging or criticising us.

It’s because you are anxious and your body is reacting. Do deep breathing and get something to calm anxiety in your mind and body. You can do it. Keep working on controlling anxiety. Try to look above the audience. The more you get in front of an audience the more you see they can’t hurt you. Also work on any insecurities so that it won’t bother you in front of people. That means loosing weight or exercising or having better posture or doing skin care routine. Work on you more and more and the people will intimidate you less and less.

Facing an audience can be daunting. "Nerves" would be the word I'd use to describe the physical symptoms you've described. It's not uncommon people deal with the same issues when they address a large crowd. The feelings that come with such an anxiety might include nervousness, fear of making a mistake, and perhaps what others might think about you. Your physical symptoms are also common as well as sweating, and even severe stomach upset. Performers talk about this issue often. May I ask a question? What goes on in your mind before you face groups? What does your self-talk sound like?