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Mathrinofeve t1_jbuiv2z wrote

Heat stroke is caused by your body temperature being raised to a level that impacts its functions. Your body doesn’t build antibodies like it would against sickness and the human body has a safe temperature range it operates in.

So no having heat stroke years prior does not make you more likely to get it now.

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chemcounter t1_jbula2s wrote

Replying to Mathrinofeve (#2,210,310)

I think the question is more aligned to whether a person's body responds in a different manner after a heat stroke than before. In other words, does the immune system or fight or flight mechanism recognize sooner that the body temperature is getting too high and start causing symptoms of heat exhaustion?

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chronicalm t1_jbut8p1 wrote

This study from 1979 suggests that there is a decrease in heat tolerance after heat stroke. It’s behind a paywall but the abstract is available. Individuals with and without previous heat stroke performed exercises under different heat conditions. Those with previous heat stroke were unable to complete the exercises under severe heat load, while every individual in the control group completed the exercises. The abstract does not mention how recently the subjects experienced heat stroke.

Cleveland Clinic has an article on heat stroke that also claims individuals who previously had heat stroke were more likely get it in the future, though they don’t reference the research that led to that claim.

This research from the University of Florida doesn’t focus on heat tolerance after heat stroke specifically, but they have found epigenetic changes in mice following heat stroke. They believe this increases the risk of metabolic disorders and weakens the immune system.

Edit: Formatting

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exphysed t1_jbv866m wrote

Repeated short term exposure to heat (without heat stroke) causes many of the same adaptations as exercise training including plasma volume expansion, improved cardiac output, decrease sweat sodium concentration, and increased thermoregulation capabilities. This makes a person less likely to suffer heatstroke.

I would imagine there could be permanent damage related to severe heat stroke, but I would be surprised if it made people more likely to suffer subsequent heat stroke (as one commenter liked to an article about). Anecdotally I know many people who’ve been hospitalized with heat stroke but have no issues in the heat subsequent to the initial incident

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SocksAndPi t1_jbvel8s wrote

I cannot sweat, therefore, I'm very susceptible to heat-related illness. When I had my first heat stroke, the doctor said I'm more sensitive to heat now and need to be more mindful of my clothing choices, outside/indoor temperatures, monitor my body temperature, and always let any future doctor know about it because some medications can also cause a sensitivity/intolerance to heat.

This article from the '90s discusses the psychological and physiological effects of heat stroke.
This PDF discusses the thermal injuries of the nervous system after heat stroke.

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Q-uvix t1_jbvhxvc wrote

Replying to chronicalm (#2,210,666)

That first article (or the abstract at least) doesn't actually suggest this.

It shows people who have had heatstrokes are more susceptible to them. That's not the same as the previous heatstroke causing or contributing to their susceptibility.

Makes sense that people who were at higher risk already are more likely have had one in the past.

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Sunlit53 t1_jbw420b wrote

Kidney injury can result from repeated rounds of heat stroke and dehydration. The dialysis and death rates among sugar cane plantation workers and migrant crop pickers increase in hotter years if they work in inhumane conditions lackng sufficient rest and hydration breaks. They’re as adapted as can be and still have problems from repeated exposure to extreme heat conditions.

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