What Are the Causes of Diarrhea in Infants?

Causes of infantile diarrhea include dietary factors, viral infections, bacterial infections, abdominal exposure to cold, and intestinal functional disorders. If frequent watery diarrhea, lethargy, or other concerning symptoms occur, prompt medical evaluation and treatment at a hospital are recommended.

1. Dietary factors: Improper feeding practices can easily trigger diarrhea. Overfeeding, rapid introduction of complementary foods, or incorrect formula preparation ratios may overload the gastrointestinal tract’s digestive capacity. Inappropriate food combinations can disrupt normal intestinal function, leading to changes in stool consistency.

2. Viral infection: Pathogens such as rotavirus and norovirus invade the intestines and damage the intestinal mucosa. This is commonly accompanied by vomiting and watery stools, is highly contagious, peaks during seasonal transitions, and impairs intestinal absorption capacity.

3. Bacterial infection: Consumption of contaminated food introduces pathogenic bacteria into the digestive tract, triggering an inflammatory response in the intestines. Stools may contain mucus; some cases are accompanied by fever. Damage to the intestinal mucosa accelerates intestinal motility, resulting in increased bowel movements.

4. Abdominal exposure to cold: Prolonged exposure of the abdomen to cold air stimulates accelerated intestinal motility. Disruption of normal gastrointestinal digestion may lead to loose stools, often accompanied by abdominal distension; symptoms may improve with proper abdominal warming.

5. Intestinal functional disorder: Infants’ gastrointestinal systems are still immature; environmental changes or emotional fluctuations can affect intestinal function. Disruption of intestinal microbiota balance reduces digestive and absorptive capacity, causing recurrent loose stools without clear signs of infection.

In daily care, ensure thorough cleaning and disinfection of feeding utensils and maintain adequate abdominal warmth. Provide oral rehydration frequently in small amounts, choose bland, easily digestible foods, and closely monitor stool characteristics and the infant’s mental status to support gradual restoration of normal intestinal function.