Which one of those 2 brings a more…painful dead?(If the death is painful…it could be that in both cases the person does not feels anything, but I do not know, so I ask)
Hyperthermia is described as being the most miserable, as dehydration is a component, and you stay real thirsty until the end. Hypothermia is generally described by it’s survivors as being real cold, then feeling all warm and sleepy and then just slipping away.
Qadgop,MD
Hey Qad, what about all the gruesome symptoms? 
Hyperthermia (heat challenge) - fever, swelling in the extremities, sweating, rapid heart rate, ichy rash, painful muscle cramps or spasms, headache, dizziness, vomiting abnormal behavior, seizures, and eventually coma and death. fun fun. You’re incapacitated, but aware of what’s going on until very near the end.
Hypothermia (cold challenge) - Initially characterized by uncontrollable shivering, lack of coordination, lethargy, and poor decision-making. As it progresses, shivering stops and pulse and respiration decrease until the victim either has a cardiac arrest or falls into unconsciousness, and eventual death. Although it sounds bad, victims who’ve survived often report states of euphoria, or enveloping warmth if they remember anything at all. This is the least painful way to go, IMO.
I spend a lot of time in the mountains. based on the progression of symptoms, I’d choose a death in winter over summer.
Recently, Guy Waterman, a famous Northeastern writer and accomplished outdoorsman chose hypothermia as his method of suicicde. By all reports, it was a serene death.
One other item of note, the poor decision making induced by mild hypothermia is more likely to kill you than the hypothermia itself. The accident record for low altitude mountaineering is rife with stories where a progressive series of minor mistakes, made as a result of cold-altered thinking, led to a final, drastic error in judgement such as failing to clip into a line, failing to choose the proper ascent route, ascending a mountian in search of safety instead of descending.
Interesting. I asked because a few days ago, a Boy Scout young died after separating from his group while visitint Isla de Mona(ok, it is in the Caribbean, near PR). This islet is desert like, with lots of shrub vegetation(no cover), no rivers or lakes, and mostly desert. So, when they did the autopsy, the death cause was hyperthermia. The local newspaper ran an article, describing symptoms, but it also had a quote from some of the doctors who did the autopsy saying “He didn’t suffer.”
So, I got another question: If the person gets a fever, would he fall into unconsciousness, and thus spared the rest of the pain? Or where those words a way to help ease the pain of the family?
Delirium and unconsciousness would come eventually, but the fever has to get very high before that happens. If you remember having a fever when you were a kid, it’s not pleasant. Let’s also not forget the feelings of terror and panic at becoming lost this child must have experienced. Telling the parents that their child “did not suffer” is just a way to ease the pain, even if they know it isn’t true. I’m sure he suffered quite a bit.