The most common cause of headache and fast heart rate may be atherosclerotic disease caused by high blood pressure, resulting in cerebrovascular ischemia and hypoxia, which causes headache, dizziness, and even nausea and vomiting symptoms. In addition, atherosclerosis of the coronary arteries can easily cause ischemia and hypoxia of the myocardial cells, resulting in increased heart rate and angina pectoris. Fast heartbeat and headache can also occur in diseases such as hyperthyroidism, resulting in arrhythmia, headache symptoms occur due to insufficient cerebral perfusion. The combination of headache and fast heartbeat can be the result of a single disease, or it can be the result of two or more diseases. Therefore, it is recommended to have a systematic diagnosis and treatment to clarify the blood pressure, heart rate, and cerebrovascular pathology.