Being hot but not sweating may be a normal physiological manifestation, or it may be related to pathological factors such as loss of lung circulation or fluid deficiency. Heat but not sweat, may be the surrounding environment temperature is high, but not to the point of sweating, this is a normal physiological performance, generally do not need to worry too much. According to traditional Chinese medicine, the lung qi Xuanfa (manifested as the discharge of turbid qi, Xuantong skin and hair, perfusion fluid and blood, etc.), the fluid will be exported to the surface of the skin and hair, into sweat from the sweat pore out of the body. Sweat is an important way of fluid excretion. Therefore, if the lung is not pronounced or fluid deficiency, can cause sweat excretion disorder, appear hot but not sweating performance. If heat without sweating is accompanied by other uncomfortable symptoms, it is recommended to consult a doctor in time to identify the cause and carry out targeted treatment.