What should I do if my 3-month-old baby has diarrhea?

When a baby develops diarrhea, it can affect their feeding and overall physical development. Many new mothers feel overwhelmed and unsure of how to respond when their baby experiences diarrhea. What should you do if a three-month-old infant has diarrhea?

What to Do When a Three-Month-Old Infant Has Diarrhea

For a three-month-old infant with diarrhea, you may apply a warm water bottle or a warm, damp towel to gently heat the baby’s abdomen. Additionally, reduce the volume of each breastfeeding or formula-feeding session while increasing feeding frequency. Regarding medications, probiotics or “mummy” (a traditional Chinese medicine preparation) may be used to help restore healthy gut function. However, avoid anti-diarrheal agents such as montmorillonite powder. Ensure the baby receives adequate fluids to prevent dehydration and electrolyte imbalance. If diarrhea is severe or persistent, consult a pediatrician promptly for further evaluation and treatment.

Diarrhea is relatively common in three-month-old infants and generally stems from two main causes: First, non-infectious factors—such as improper feeding practices or exposure to cold weather or cold-induced upper respiratory infections (e.g., common cold). Second, infectious causes—typically resulting from ingestion of contaminated food or water, allowing bacteria or viruses to enter the body and trigger intestinal inflammation and subsequent diarrhea.

In daily care, always thoroughly wash your hands and breasts before breastfeeding. Keep the baby warm—especially the abdominal area—and dress the baby appropriately according to ambient temperature. We hope this information proves helpful.