1. Introduction A sudden wave of heat in the face after eating hot soup is a physiological reflex driven by thermal vasodilation and gustatory stimulation. The high temperature of the ingested fluid triggers thermoreceptors in the mouth and esophagus, prompting the autonomic nervous system to dilate peripheral blood vessels in the face to dissipate excess … Read more
1. Introduction A hot, red face after eating spicy food is a neurovascular response triggered primarily by capsaicin, the active compound in chili peppers. Capsaicin binds to specific heat-sensing receptors in the mouth, tricking the brain into perceiving a dangerous increase in body temperature, which responds by dilating facial blood vessels to dissipate the phantom … Read more
1. Introduction Sweating profusely from the head and face while eating is a physiological phenomenon known as gustatory sweating, which can be a normal autonomic reflex to hot or spicy foods, but frequently indicates an underlying neurological misdirection known as Frey syndrome. While mild perspiration during a spicy meal is an expected biological response to … Read more