Panic when lying down may be related to overwork, pericarditis, heart failure and other factors. 1. Overwork: Overwork will cause some damage to the body, which may be reflected in the heart, lying down with a panicky heart is a warning from the body, usually in the restoration of regular work and rest can be relieved on their own. 2. Pericarditis: a chronic inflammatory disease of the heart that occurs under the influence of viral and bacterial infections and other factors, the lesions will secrete inflammatory exudate, resulting in pericardial effusion. When a person lies down, the pressure of the fluid on the heart increases, and there is a performance of panic in the heart when lying down. 3. Heart failure: a variety of cardiac conditions that lead to myocardial strain, such as myocardial infarction, myocarditis, etc., may develop into heart failure. Lying down after the increase in the amount of return blood, heart failure patients with decreased cardiac function, beyond the load, the appearance of lying down the heart will be panicked. It is recommended to keep a relaxed mood and get enough sleep in weekday life. If the symptoms persist, you should seek medical treatment to identify the cause and follow the doctor’s instructions.