Panic in the afternoon may be caused by physiological phenomena, tachycardia, hypertension, hyperthyroidism, anemia and other reasons. 1. Normal physiological phenomenon. If you are under stress, use your brain too much, or have poor sleep at night, you may experience short-term panic attacks, but usually there is no special abnormality in the examination, and you can be relieved after resting. 2. Tachycardia. Mostly seen in pathological tachycardia, the patient has previous underlying heart disease, such as myocarditis, heart failure, valvular disease, etc., or there are clear abnormalities of cardiac electrical activity, such as atrial fibrillation, supraventricular tachycardia, etc., the appearance of panic attacks, can be clarified through electrocardiography, cardiac ultrasound and other investigations. 3. High blood pressure. Blood pressure rises from 4 to 6 p.m., and the patient may have a panic attack at this time. Patients usually have a history of high blood pressure and recent fluctuations in blood pressure. 4. Hyperthyroidism. Due to the increased secretion of thyroid hormone, high basal metabolic rate, sympathetic nerve excitation, tachycardia, thyroid function test can be clear. 5. Anemia. Patients with anemia, due to low hemoglobin, need to reflexively accelerate the circulation, so that the heart rate increases to meet the body’s oxygen demand. This can be clarified by routine blood tests. When you have a panic attack in the afternoon, you should go to the hospital in time to get a clear cause and treatment.