Stooling when the elderly are critically ill is usually due to gastrointestinal dysfunction, increased intestinal contents, side effects of drugs, secondary intestinal infections and other reasons. 1. Gastrointestinal dysfunction: most of the critically ill elderly will have more serious gastrointestinal dysfunction, the gastrointestinal tract appears irregular or accelerated peristalsis, so there will be pooping, or even diarrhea, which can easily lead to water and electrolyte balance imbalance. 2. Increase in intestinal contents: the elderly who are critically ill, the intestinal absorption of water will decline, increasing the exudate in the intestinal lumen, stimulating intestinal function, increasing the burden on the intestinal tract, so there will be a situation of pooping. 3. Drug side effects: it may be because of too much medication, adverse drug reactions, leading to the situation of pooping. 4. Secondary intestinal infections: people who are critically ill often have low immune function, which makes them prone to secondary intestinal infections and infectious diarrhea, which manifests itself as pooping. 5. Fecal incontinence: patients with impaired consciousness or intracranial lesions may lead to fecal incontinence. Note: People who are critically ill should actively maintain the balance of water and electrolytes to avoid hypovolemic shock or ionic disorders, and follow the doctor’s instructions for treatment.