"Of the 2 methods for testing the sweating mechanism, TST is more sensitive than QSART."

"Some patients with erythromelalgia (perhaps 5%-10%) cannot tolerate the test..."

I don't know if I have erythromelalgia, but I doubt I would survive the TST.

"The patient is enclosed in a cabinet with 45°C-50°C air temperature and 35%-40% relative humidity... Maximal sweating is generally achieved in 30 to 65 minutes."

I feel extreme stress when the room temp hits 25C. Today I was in a room that was 26C and my chin nerves got very agitated, too. My body reacts within seconds of the temp rising.

I'm starting to suspect the failure to sweat allows the heat to rise so high it virtually burns and actually damages nerves.

Recently I'd wake up with cold feet. I can't raise the RT and still get to sleep so I wore socks. Now my ankles are sensitive and feel burning instead of just my feet.

A few years ago, I was reading a book while lying on my back. My back felt a little hot, but I ignored it and kept reading. Shortly afterwards I felt a muscle spasm, and not long afterwards, and to this day, I cannot lie on my back comfortably without a cooling pad. Otherwise the twitches or spasms return and I feel very stressed out.

I used to think the problem was with my hypothalamus, because it regulates temperature, but now I'm not so sure.

"Erythromelalgia is a rare neurovascular peripheral pain disorder in which blood vessels, usually in the lower extremities (or hands), are episodically blocked (frequently on and off daily), then become hyperemic and inflamed. There is severe burning pain (in the small fiber sensory nerves) and skin redness. The attacks are periodic and are commonly triggered by heat, pressure, mild activity, exertion, insomnia or stress."

My attacks have been triggered by heat, pressure, insomnia and stress, and they have affected my feet and hands, but there hasn't been any skin redness I've noticed, so I don't know if I've got Erythromelalgia.

There were times in the last year, but not so much lately, where I'd feel too hot and then five seconds later too cold. This oscillation would happen repeatedly in a short period of time, like 5-10 minutes.

As I mentioned in another thread, one time when I do sweat, but only a little, is just after coming out of a nap. My hands and feet tingle without pain for about 30 seconds, and both get slightly moist/almost sweat.

I've suspected an endocrine issue that could be affecting nerves and sweat glands. I've had some kind of chronic fatigue for decades. The current chronic heat sensitivity typically caused insomnia which worsens the fatigue/prevents full recovery after rest.

I made a breakthrough of some kind recently when I read about how the body cycles during sleep.