What causes us to become nervous?

Nervousness is typically caused by a combination of physiological and psychological factors. It often arises in response to perceived threats or stressors, triggering the body's fight-or-flight response, which releases adrenaline and other hormones. This response leads to physical symptoms such as increased heart rate and sweating. Additionally, factors like past experiences, social situations, or fear of failure can also contribute to feelings of nervousness.