Anxiety can cause an increase in body temperature, as the sympathetic nerves of the body release large amounts of catecholamines as well as adrenocorticotropic hormones and thyroid hormones during anxiety. These hormones are all energy-producing hormones, which can cause increased heart rate, skin vasodilation, and accelerated blood flow, so the overall metabolism will increase, and the body temperature will also increase in the overall increased metabolic state. Usually, the relative increase in body temperature will not exceed 37.3℃ in the armpit. If it exceeds 37.3℃, it should be considered whether there is some pathological problem. If the temperature does not persist after the anxiety has subsided, it is recommended that a hospital visit be made to identify the cause of the elevated temperature.