1. Definition of chronic diarrhea in infants Chronic diarrhea in infants refers to long-term (more than 2 weeks) diarrhea symptoms in infants and young children. The number of bowel movements per day increases, the amount of stool decreases, the texture is thin, watery or mucus-like, and is accompanied by indigestion, malnutrition, etc. Performance. 2. Causes of chronic diarrhea in infants 1. Infectious factors: such as bacterial infection, viral infection, etc. 2. Dietary factors: such as adding too much solid food too early, lactose intolerance, etc. 3. Immune factors: such as IgE-mediated food allergy. 4. Intestinal flora imbalance: such as antibiotics