Everytime I perform I get the jitters and it doesn't seem like I'm nervous but my pits sweat and my knee starts to shake a bit and its very uncomfortable. Maybe from adrenaline or something similar but I was wondering if anybody else has this.
I used too.
I couldn't really perform for people that well, but once I did I loved the feeling of the reactions and them wanting me to perform more tricks.
It's something you have to work on and get the hang of it.
I don't really get nervous anymore.
You still get nervous, just that your nerves don't bother you that much.
Yup. As Rabid also said, just to second this very important point, you should always be nervous, but with time and performance, you will feel it less.