If often panic and fear, the main reasons are the following: 1, may be a psychological disease, mainly anxiety problems, anxiety patients can easily become nervous, fear, along with a variety of physical symptoms, such as panic, hand trembling, sweating, blushing, poor breathing, may also be accompanied by action and behavior problems, such as increased small movements, or accompanied by fidgeting, constantly walking around, sleep Problems such as fidgeting, walking around, and poor sleep. If the problem is anxiety, it is easy to cause panic, fear, trembling and so on. 2, may be caused by physical diseases, such as endocrine disorders or abnormal secretion of thyroid hormones, these physical reasons are also easy to make yourself nervous, especially with thyroid disease, the heart may have problems, and even panic, palpitations. 3, may also be caused by personality factors, some people are Introverted personality or have personality defects, such as easy to worry, nervous, always complaining, this time it is easy to be nervous, afraid, panic, hand shaking because of some small things.