Baby Poop: What’s Normal and What’s Not

Four days with a clean diaper, or one red streak, and a diaper change turns into an investigation. Newborn stool changes a great deal over the first year, and most of what looks alarming is ordinary.

Color and texture are the place to start. Meconium gives way to the yellow seedy stool of breast milk, formula stool runs tan and firmer, and iron drops or a first solid food turn everything a new shade for a while. Frequency swings just as widely, from a dirty diaper after every feed to one a week in a comfortable breastfed baby. Straining, grunting, and a red face are usually a baby learning to push and relax at the same time rather than constipation.

Some things do warrant a call rather than a wait. Bright red blood or mucus in a stool, black stool after the meconium days, white or chalky stool, a hard belly with vomiting, or a baby who has stopped feeding and stopped wetting diapers all belong with your pediatrician or a nurse line the same day. Describe what you saw and let them judge it.

The laundry side is its own skill, since breast milk and formula stains behave differently, cold water beats hot on both, and a few hours of sun does more than most stain removers.