Level 1: Causes of diarrhea Diarrhea is more common in one-month-old babies, and the main reason is due to gastrointestinal infection. These infections may be caused by bacteria, viruses, or other microorganisms. In addition, babies may have diarrhea due to allergies, adverse food reactions, or indigestion. Level 2: How to relieve diarrhea For one-month-old babies, diarrhea may lead to problems such as dehydration and malnutrition. Therefore, some measures need to be taken to mitigate this situation. First of all, you can feed the baby some easily digestible food, such as rice noodles, bananas and apple puree. Secondly,