1. Baby diarrhea caused by food allergy Food allergy refers to the body’s overreaction to certain specific foods, causing uncomfortable symptoms. For babies, common allergens include milk, eggs, peanuts, soybeans, fish, etc. When the baby eats these foods, the immune system will react, causing diarrhea and other uncomfortable symptoms. 2. Infectious diarrhea Infectious diarrhea refers to diarrhea caused by bacterial, viral or parasitic infection. For babies, common sources of infection include salmonella, E. coli, etc. These bacteria or viruses