You may be suffering from synthetic fibers, check your clothing and bedding for polyester. It has very poor characteristics for comfort and feeling hot and sweaty is a key characteristic. This isn't some hippie shit, you'll genuinely be much more comfortable in real non-plastic fibres and you'll significantly reduce your microplastic generation and exposure as a direct byproduct.

After abandoning plastic fibers, I can't even put on a polyester jumper in winter without overheating and getting sweaty. Real organic fibres are so much more comfortable and only marginally more expensive.

Hate the laws of thermodynamics? Put that hatred to good use and become a mechanical engineer! Doesn’t matter if it’s aerospace or manufacturing! We all hate that doing fun stuff generates heat, so we design complicated systems to make things like 1% more thermodynamically efficient 👍

(This sounded funnier in my head)

our natural body temperature does its best to perfectly balance out to 36.6C, but you are a biological machine, you keep generating heat by just existing, and you need to release the excess. it's much easier when the air around you is colder, but when it's starting to reach the same temperature as your body then your the "uh oh sweating time" triggers to help you along

Sweat is a perfectly normal process, though. Being able to sweat a lot and having it evaporate quickly (little bodyhair compared to most other mammals) is one of humanity's big evolutionairy advantages.

Your natural body temperature is not uncomfortable for you, it's natural because it's perfect for you. What you don't like is ambient temperature to be equal or higher than the body temperature, because that means that your body now has to do more work to get to the optimal, natural body temperature.

Equating ambient and body temperature is just a mental fallacy you've fallen victim of, you could just as well say "oh 25°C being perfect for us is bullshit". Why is it bullshit? You don't like the number? It just doesn't mean anything.

As to the topic at hand... I don't understand why you can't just remove/add layers of blankets dynamically based on the temperature around you?

Ah yes, damn our natural state of multiple blankets

See also that YOUR temperature drops overnight. Your body temp goes down about 2 degrees overnight starting at the same time your body starts releasing melatonin before bed. This means as you start to wake up you also start to warm up, so you're partially at fault here too!

All animals are producing heat by metabolism, and so are naturally hotter than their environments. Being in an environment that is as hot as your ideal body temperature means your metabolism raises your temperature above the ideal.

The only way around this is active cooling - like sweating - which is generally uncomfortable as a signal that you are expending energy on keeping cool and try and get somewhere cooler where you won't have to expend as much energy on that.

Is going to be earlier and waking just before things start heating up an option? Here in rural northeastern Japan, we do that to beat the heat of the day for work outside (getting up right around 4 or a bit before when days are their longest) and a lot of folks are asleep by 20 or 21.

Some basic math - we're a special who's body generates heat, so works best in conditions with a temperature lower than our body temp. Otherwise we need to sweat to efficiently transfer heat.

yeah and its like a temp feels fine one day and not another. thing is I love covers and the feeling of being bundled up in one or near a fire. So like its kinda nice being cold. Similary its great for it to be hot when you have a place to swim. The cool water feels so nice.

Memory foam traps heat.

And is your blood sugar good?

It might not be either of these things, but they are worth crossing off the list of reasons.

I had the same thing today.

Although, it would be rude not to give booze and night terrors their share of the credit too.

Temperature is a human invention, it doesn’t exist in nature. What exists in nature are particles with differing amounts of thermal and kinetic energy. Temperature is a measurement of the average kinetic energy of the particles in an area. But just like with the average height of people in a room, there’s no guarantee that any particular particle is equal to that average.

Now, having got that out of the way, the way our bodies work is that they seek a thermodynamic equilibrium. That is, they try to match the amount of heat (thermal energy) lost through the skin to the amount of heat produced internally by metabolic processes. One way to achieve this is through the evaporation of sweat. This requires good airflow, however, which heavy blankets prevent.