Easy to be nervous to clarify the cause of the trigger, specifically the following reasons: 1, because of the character or stimulated or their own anxiety. People prone to anxiety are prone to nervousness, to find the cause, to exclude long-term stress caused by mental, psychological problems; 2, patients with psychiatric symptoms prone to nervousness, can have hallucinations, delusions. If suspicious, suspecting that others are trying to hurt him, or hear others talking without seeing people, they will be nervous and feel endangered to their own personal safety; 3, themselves prone to anxiety, genetic in nature; 4, patients with emotional disorders can appear anxious, depressed patients can also appear. So try to identify the causes, some of which can be removed and some cannot, and you can change your lifestyle to reduce the anxiety factor and lower the level of anxiety in the future.