Why does my body get so hot but im not running a fever? My feet are cold also! I don't understand what causes this?

Many possibilities. There are many reasons to feel hot with a normal temperature. If the immune system is activated by a virus, for example, one might feel hot but not have a fever. An overactive thyroid can cause one to feel hot. If the body is trying to conserve heat or circulation then less blood will flow to the feet, making them cooler. If symptoms are persistent, a medical exam can rule out serious issues.