If the patient presents with an uncomfortable heartbeat as soon as he or she lies down, it is important to visit the hospital at this time. A 12-lead or 18-lead ECG should be checked to rule out a serious cardiogenic disease. If available, the hospital should complete myocardial enzymology and myocardial infarction markers as soon as possible to see if the condition is due to acute coronary syndrome. If it is an acute coronary syndrome, coronary angiography is recommended, or thrombolysis and other medications are recommended. If it is a simple arrhythmia that causes the heart to beat uncomfortably when lying down, certain anti-arrhythmic drugs should be applied, such as beta-blockers, or lidocaine, verapamil, etc., or calcium antagonists, which have the effect of regulating the heart rate. In addition, if the electrocardiogram and myocardial enzymology examination, there is no obvious abnormality, it is necessary to exclude whether the patient has a series of conditions such as cardiac vegetative nerve dysfunction.