The heart beats wildly when waking up from a nap, mainly due to sympathetic overexcitation after waking up, which causes tachycardia or arrhythmia. The clinical symptoms often manifest as palpitations, or in the words of the old people, a racing heart with chest tightness. It is recommended to further examine the electrocardiogram or 24-hour ambulatory electrocardiogram, ambulatory blood pressure and cardiac ultrasound, etc. If necessary, check the thyroid ultrasound and the seven items of thyroid function to exclude the thyroid disease caused by the heart beating wildly after waking up, analyze the causes of the symptoms after detailed understanding of the condition, and give targeted treatment. The increased heart rate itself can easily lead to insufficient blood supply to the heart muscle, causing symptoms such as chest tightness, panic, shortness of breath, etc. Simple tachycardia can be treated with drugs that inhibit sympathetic activity, beta-blockers, metoprolol or bisoprolol, etc., which can effectively control the symptoms of the heart beating wildly after waking up from a nap. Stabilize blood pressure and heart rate, protect heart function, slow down heart rate, prolong heart diastole, increase coronary blood perfusion, improve myocardial blood supply, help prevent myocardial ischemia caused by increased heart rate, also can significantly improve the discomfort symptoms of the heart beating wildly after waking up from a nap.