当气温超过人体皮肤温度或环境中有热辐射源时，人体传导散热的功能就会发生障碍，这时人体只能通过汗腺蒸发散热。但在气温高、湿度大、不通风、体质差时，体内积蓄的热量便不易散发出去，这样体内积存的热量会越来越多，再加上出汗多，大量失水、失盐，致使体温调节功能失调 When the temperature exceeds the human skin temperature or thermal radiation in the environment, the human body conduction and cooling functions will be an obstacle, then the human body can only evaporate heat through the sweat glands. However, when the temperature is high, the humidity is high, the air is not ventilated and the body is poor, the heat accumulated in the body will not easily be dissipated. As a result, more and more heat accumulates in the body, and more sweating, a lot of water loss and salt loss will result Temperature regulation dysfunction