1. Premonitory heatstroke: In a high temperature environment, headache, dizziness, thirst, excessive sweating, weakness and soreness of limbs, lack of concentration, uncoordinated movements, etc. occur, and the body temperature is normal or slightly elevated. If you move to a cool and ventilated place in time, cool down, and add water and salt, you can recover in a short time?

2. Mild heat stroke: In addition to the above symptoms, the body temperature is often above 38°C, accompanied by complexion. Flushing, profuse sweating, burning skin, or clammy limbs, pale complexion, decreased blood pressure, rapid pulse, etc. If you move to a cool and ventilated place in time, lie down and undress, cool down, and replenish water and salt, you can recover within a few hours?

3. Severe heatstroke:

(1) Heat Cramps: are brief, intermittent episodes of muscle spasm that may be associated with sodium loss. Heat cramps often occur when working in a high-temperature environment for the first time, or when exercising excessively, sweating a lot and only replenishing water. The clinical manifestations are transient, intermittent muscle twitching during or after training. Heat cramps are sometimes confused with tetany caused by hyperventilation during heat exhaustion, which often results in tetany and numbness of the distal limbs and around the mouth.

(2) Heat exhaustion: refers to a group of clinical syndromes characterized by insufficient blood volume after heat stress. Under severe heat stress, there is excessive loss of body fluids and body sodium, and water and electrolyte disorders, but there is no obvious central nervous system damage. Clinical manifestations include excessive sweating, fatigue, weakness, dizziness, headache, decreased judgment, nausea and vomiting, and sometimes muscle spasms, postural vertigo and syncope. The body temperature increased without obvious neurological damage. If heat exhaustion is not diagnosed and treated in time, it can develop into heat stroke.

(3) Heat stroke:

(1) Exertional heat stroke: As the name suggests, it is more common in people participating in sports and training officers and soldiers who are exposed to high temperatures and high temperatures for a long time. In a humid, windless environment, after high-intensity training, fever and sudden fainting may occur, and the body temperature can rise up to 40°C. In severe cases, delirium, drowsiness and coma may occur.

(2) Non-exertional heat stroke: It often occurs in the elderly, frail and chronically ill people, and the onset is slow. Early symptoms are difficult to detect, and symptoms will worsen 1 to 2 days later, leading to confusion and coma. Its body temperature can be as high as 40℃~42℃, and the rectal temperature can be as high as 46℃.