[Nick87633]

I've definitely felt this before, The hot soup, hot tea, sweatpants, sweatshirt, wool hat, get-in-bed I feel like I'm about to have a fever reflex.

[bitwize]

I tend to get chills with my fevers. Maybe "chills" in ill mammals are similar instinct, to provoke the urge to bundle up and get warm when it isn't necessary, thus instigating a fever?