After diarrhea, the whole body feels cold, mostly seen in acute gastroenteritis, electrolyte disorders, fever. 1. Acute gastroenteritis: most common in the summer and fall seasons, may be due to eating unhygienic triggered by acute inflammation of the gastrointestinal mucosa, often severe diarrhea, vomiting, abdominal pain and other symptoms, and because of diarrhea is more often, you may feel weak, cold and other symptoms. 2. Electrolyte disorders: may be due to diarrhea more often, not timely replenishment of water, which leads to electrolyte disorders, often lead to chills. 3. Fever: If diarrhea is caused by an intestinal infection, it often causes a fever, and during the period of elevated temperature, you may feel chills all over your body. If the diarrhea is more serious, you must pay attention to drink more warm water, you can also drink some sugar and salt water to avoid dehydration and electrolyte disorders, and go to the hospital in time.