After working in a hot environment for a certain period of time, people will experience dizziness, headache, thirst, sweating, generalized fatigue, palpitations, and even lack of concentration, uncoordinated movements and other symptoms, the body temperature can be normal or slightly higher, at this time, the patient has a mild heat stroke. If the patient is promptly transferred to a cool and ventilated place, rest quietly, replenish water, electrolytes or cool beverages, the patient can recover in a short time, and intravenous supplementation of saline and glucose can be done if necessary. If the patient appears pale, skin and limbs wet and cold, blood pressure drops, pulse rate increases, weak pulse and other signs of weakness, the patient may enter a serious state, must be sent to the hospital in a timely manner.