The first night I ever got this condition I woke up in a cold sweat and went ice cold and then broke out in a sweat. Sometime's I'd just sweat. I was terrified. In a book I just got (fairly helpful) called "I.B.S. Relief, A Doctor, a Dietician and a Psychologist Provide a Team Management Approach to IBS", I just read that it's your body reacting to the diarrea by activating the sympathetic nervous system. It says, "These are the nerves to prime the heart to pump the blood to the body faster, which often causes a flushing sensation called the flight-or-fight response..." Hearing that would have made me feel better at the time. I really was afraid I was going to die.