Panic and trembling as soon as you encounter things may be a physiological phenomenon, but also angina, arrhythmia, vegetative nerve disorders, anxiety disorders and other diseases. 1. Normal people may cause emotional excitement after encountering things, stimulate the sympathetic nerve excitation, resulting in physiological excitement of the heart, so the heart will be panicky shivering. 2. angina pectoris: the existence of patients with coronary artery atherosclerosis caused by narrowing of the lumen, myocardial chronic blood supply is insufficient to meet things when the myocardial oxygen consumption increases, further aggravate myocardial ischemia, so it will be panicky shivering. 3. Arrhythmia: after the heart excitation system and conduction system are damaged, the normal rhythm of the heart is changed, and the attack is induced by emotional excitement and other factors, so the heart will panic and tremble when encountering things. 4. Phytoneurotic disorder: The symptom occurs due to the abnormal excitement of sympathetic nerves, which leads to the abnormal excitement of the heart. 5. Anxiety disorders: this disease will not only appear nervousness, anxiety, panic and other mental symptoms, will also be complicated by panic, hand shaking, sweat and other physical symptoms. A panic attack may be related to a variety of factors, and it is recommended to consult a doctor for a clear diagnosis.