Diarrhea in newborns

Diarrhea in newborns: How to distinguish from normal?

Determining diarrhea in a newborn can be difficult, because normal stool in breastfed infants is itself loose, porridge‑like and very frequent. However, diarrhea has its characteristic features, and the main danger it poses is rapid dehydration.

What does diarrhea look like in an infant?

Unlike ordinary loose stool, diarrhea is characterized by:

• Sudden and sharp increase in frequency of bowel movements (significantly more than usual for your child).
• Very watery stool that is almost completely absorbed by the diaper.
• Change in color and odor: the stool may become green, contain mucus, or have a strong, unpleasant smell.
• Presence of blood in the stool.

Diarrhea is often accompanied by other symptoms: fever, vomiting, refusal to eat, and irritability.

Causes and main danger

The most common cause of diarrhea in infants is intestinal infections (viral, such as rotavirus, or bacterial). It can also be a reaction to medications (antibiotics taken by mother or child) or a manifestation of food allergy.

The main threat of diarrhea is rapid dehydration. The infant’s body loses a large amount of fluid and electrolytes, which can be life‑threatening. Therefore, the primary task for parents is to ensure adequate fluid replacement. The best method is frequent breastfeeding. If the baby is on formula, the doctor may recommend special rehydration solutions.

If you suspect your child has diarrhea, especially if it is accompanied by other symptoms, you must consult a pediatrician. Caring for the newborn’s health is important from the first days.