When I get nervous my hands get started shaking like if I go to give a presentation in front of my faculty and other students, I really get nervous that time and that time my whole body like my legs and my hand start shaking. Today I was doing a lab experiment.That time I have to inject a mice and I got nervous time and my hand started shaking so badly that I couldn't inject it.Though I know how to inject a mice in proper way. this is my problem.help me