The phenomenon of heart sweat may be physiological reasons, but also may be pathological reasons, such as systemic diseases, heart disease and respiratory diseases. 1. Physiological reasons: the phenomenon of heart sweating is caused by the high temperature of the environment in which the body is located or wearing clothes that are too thick, which is a normal physiological phenomenon. 2. Pathologic causes: (1) systemic diseases: ① hypoglycemia: due to insufficient intake of sugar or excessive consumption and other factors leading to a drop in blood sugar, palpitations (rapid heartbeat, often accompanied by panic), sweating and hunger and other clinical symptoms, but also manifested as the phenomenon of sweating at the mouth of the heart. ② Hyperthyroidism: due to high levels of thyroid hormones and lead to increased metabolic rate of the body, heat production is greater than heat dissipation, so the phenomenon of sweating can occur. (2) heart disease: if the body suffers from coronary heart disease and other heart diseases, which can lead to the heart’s blood supply, oxygen supply is insufficient, which will be due to severe angina and other reasons for the emergence of the phenomenon of heart sweating. (3) respiratory diseases: if the body suffers from certain respiratory diseases can also appear heart sweating, coughing and other clinical symptoms, such as viral colds. If sweating occurs and physiological causes are excluded, it is recommended to go to the hospital in time.