Level 1: What is the cause of baby\’s diarrhea? There are many reasons for diarrhea in babies. It may be caused by intestinal infection caused by viruses, bacteria or parasites, or it may be caused by allergies, improper diet or immature digestive development. In addition, babies who eat too much juice, vegetables and other foods with high water content can easily cause diarrhea. Level 2: How to prevent diarrhea in babies? To prevent diarrhea in babies, first of all, we must pay attention to hygiene and keep the home environment clean and sanitary; secondly, we must pay attention to dietary safety and try to avoid feeding expired and spoiled food to babies; finally, we must pay attention to the baby\’s diet structure and nutritional balance, and try to avoid eating a single drink.