Mild heatstroke or active treatment usually leaves no sequelae. If the heat stroke is severe and is not actively treated, there may be permanent neurological sequelae. For mild heatstroke or those who take active cooling measures after heatstroke, there are usually no sequelae and no need to worry too much. However, for some severe heatstroke, such as pyrexia, and those who do not take active cooling measures after heatstroke, high fever may cause rapid death of brain cells, resulting in coma, ataxia, etc., which may leave permanent neurological sequelae. Some severe heatstroke may also cause myocardial ischemia, necrosis, arrhythmia, and renal dysfunction, severe muscle damage, organ failure, etc. due to the persistent high temperature. In addition to the sequelae, severe heatstroke is also easy to life-threatening, should be taken seriously. It is recommended that heat stroke victims actively take first aid measures to reduce the impact on the health of the body. Minimize outdoor activities in hot weather, the crowd should also pay attention to drink more water.