When you're nervous, your heart beats so hard, your hands and feet shake. What's going on?

1. Cardiac neurosis

Cardiac neurosis may be related to genetic factors, environmental factors, nerve types and other factors, patients with nervous dysfunction, in a state of tension, may appear heart rate accelerated, blood pressure increased, sweating, hands and feet shaking and other symptoms.

2. Anxiety disorders

Anxiety disorders may be related to genetic factors, neurobiochemical factors, when patients with anxiety, may appear palpitations, limb numbness, hand and foot twitching and other symptoms.

3. Hypoglycemia

Hypoglycemia may be related to insufficient sugar intake, insufficient sugar production and other factors, the body is in a state of tension, easy to induce hypoglycemia, patients may appear palpitations, tremors and other symptoms.