Severe heatstroke represents the most critical form of heat-related illness, posing a life-threatening risk without prompt intervention. This category is further subdivided into four types: heat cramps, heat exhaustion, sunstroke, and heatstroke.
Heat cramps typically occur when profuse sweating and thirst lead to excessive water intake without adequate salt replenishment, causing a rapid and significant drop in blood sodium chloride concentration. This type of heat illness manifests as sudden, paroxysmal muscle cramps and pain.
Heat exhaustion symptoms: This condition commonly affects the elderly and individuals unaccustomed to high temperatures. Primary symptoms include dizziness, headache, palpitations, thirst, nausea, vomiting, clammy skin, low blood pressure, fainting, or confusion. Body temperature remains normal or slightly elevated.
Sunstroke symptoms:As its name suggests, this type of heatstroke results from direct exposure to intense sunlight. Strong rays penetrate the scalp and skull, damaging brain cells and causing cerebral congestion and edema. Since the head is primarily affected, initial symptoms include severe headache, nausea, vomiting, and restlessness, potentially progressing to unconsciousness and convulsions.
Characteristics of heatstroke symptoms: Some individuals engaged in prolonged physical labor in high-temperature environments may experience excessive heat production coupled with inadequate heat dissipation, leading to a rapid rise in body temperature.Early symptoms include profuse cold sweats, followed by anhidrosis, shallow rapid breathing, weak rapid pulse, restlessness, confusion, and dropping blood pressure. This progresses to coma with limb convulsions; severe cases may develop cerebral edema, pulmonary edema, or heart failure.
Health Advisory: If someone experiences heatstroke-induced unconsciousness in high temperatures, immediately move them to a well-ventilated, shaded area. Pour cool water over their body to lower their temperature. Continuously monitor their body temperature. If a high fever around 40°C persists, promptly transport them to an experienced hospital for fluid resuscitation treatment. Never underestimate this as ordinary heatstroke, as delaying treatment can be critical.