Level 1: Causes of diarrhea in five-month-old babies Diarrhea in five-month-old babies may be caused by many reasons, including infection, allergies, indigestion, etc. Infections may be caused by bacteria, viruses or parasites, and common symptoms include diarrhea, vomiting, fever, etc. Allergies can be caused by food or environmental factors, and common symptoms include red skin and shortness of breath. Indigestion may be caused by food allergies, improper feeding, or other reasons. Common symptoms include bloating, constipation, etc. Level 2: How to relieve Wu Yue Bao