why is the default state of Numbness Warmth?

 

even if the numb part is actually cold to the touch, the brain seems to default it to a warm feeling.

 

is there any reason for this?

I thought numbness was lack of feeling. The warmth just could be a filler thing.

 

However, if a part is cold to the touch, your brain should default it to a warm feeling. If a part is colder than its surroundings, then energy will move from its surroundings to it, giving a feeling of warmth. When it's hot outside, for example, your body would feel cold to the touch by anything touching it that had been in equilibrium with the air temperature.