If patients have panic at noon, there may be several factors as follows: 1. Hypoglycemic reaction, for patients with hypoglycemia, the most common strong symptoms are palpitations accompanied by chest tightness, shortness of breath, weakness, dizziness, headache, cold sweat and other conditions. Therefore, patients who usually have panic at noon often belong to the clinical symptoms and manifestations of hypoglycemic reaction. 2. If the panic is combined with chest tightness and chest pain, or is obviously related to physical activity, it may be related to coronary artery insufficiency of blood supply. 3. In some endocrine metabolic diseases, the basal metabolic rate increases and the metabolic rate is hyperactive at noon, for example, patients with hyperthyroidism and adrenal cortical function 4.After excluding the above mentioned organic factors, there may also be emotional and psychological factors.