When waking up with a sore throat, stuffed nose and propensity to feel colder than normal, you can be unsure exactly what infectious vector caused it.
Some people's normal modus operandi would be to turn on the heater, wear more blankets available and can still feel pretty cold.
Sometimes, after piling them all on you can feel pretty warm even despite the illness.
The issue is that I know from first hand experience that this degree of heating would have me bursting out of the room, away from blankets and heater, desperate for fresh air and the temperature relief of a colder environment if my internal thermostat wasn't malfunctioning.
So I was wondering whether the feeling of coldness is primarily due to the body being less effective at producing heat, or if the coldness is entirely mental, because if it's the latter, can you suffer hyperthermia or dehydration in your sleep?