If a patient has a rapid heartbeat before going to bed at night, there are usually physiological and pathological causes. For physiological factors, it is common to have tachycardia at bedtime due to excessive stress, stress, fatigue, or drinking large amounts of strong tea or coffee, smoking, or alcohol before bedtime. For pathological causes, such as coronary heart disease, unstable angina, various factors causing arrhythmia, acute myocarditis, pericarditis and other conditions. Also, for endocrine metabolic disorders such as hyperthyroidism and hyperadrenalism. The heart rate may also increase in case of obvious infections or after the body temperature rises. Finally, in patients with plant neurological disorders, this symptom may also occur in cardiac neurosis.