Muscles can "necrosis" without subjective symptoms...
FNN Prime Online
It's been a cold day that I can't stand with just winter clothes. Many people use disposable body warmers and hot water bottles. There is something to be aware of when using such a "heating element". It's a "low temperature burn". [Image] Points to note to avoid low-temperature burns... Low-temperature burns are burns that occur when the same part of the skin is in contact with a heating element that is slightly warmer than body temperature for a long time. I sometimes wake up with warmers, hot water bottles, electric blankets, hot water, stoves, etc. When the temperature of the heating element is 44 degrees, it takes 3 to 4 hours, 46 degrees less than 1 hour, and 50 degrees less than 3 minutes. Even at a comfortable temperature, low-temperature burns can occur in an unexpectedly short time. Low-temperature burns are often accompanied by no subjective symptoms such as pain, and may damage deep tissue and muscle necrosis. To prevent low-temperature burns, the first thing you should be careful about is not to heat the same part for a long time. For example, when using a hot water bottle or an electric blanket when sleeping, it is necessary to devise ways to avoid directly warming the skin, such as taking out the futon only after warming it. (Tokai Television)
Tokai TV
