The fast heartbeat after eating breakfast is considered to be caused by physiological reasons or pathological reasons such as hyperthyroidism or myocardial ischemia, which can improve the relevant examination to clarify the diagnosis and symptomatic treatment. 1. Physiological reasons: after eating too much breakfast, the stomach will expand, the stomach expansion will make the diaphragm upward compression of the thoracic cavity, thus appearing fast heartbeat. It is recommended not to eat too much breakfast, which can relieve the panic. 2. Pathological causes: hyperthyroidism, myocardial ischemia, cardiac arrhythmia, anemia, etc. can also cause panic, rapid heart rate. Cardiac enzymes, electrocardiogram, blood test, thyroid function test can be perfected for differential diagnosis. (1) If it is caused by myocardial ischemia, oral isosorbide mononitrate can dilate blood vessels, and metoprolol can slow down the heart rate to reduce myocardial oxygen consumption. (2) If the panic is caused by hyperthyroidism, oral propylthiouracil can be used to inhibit thyroid hormone synthesis to reduce the heart rate. (3) If the arrhythmia can be used to stabilize the heart granules and other drugs. (4) In case of anemia, iron supplements, folic acid, vitamin B12, etc. are usually needed. Abnormal heartbeat, it is recommended to consult a doctor in time to check, avoid blindly self-medication, so as to avoid adverse consequences.