Baby Poop Colour Guide: What's Normal and What Means Call the Doctor

Find the colour

Tap the colour closest to what is in the nappy. You will see what that colour usually means, and whether it is normal, worth watching, or a reason to call your doctor. The colours that need a call carry a red dot.

Why the colour keeps changing

A baby's stool is not meant to look the same from one week to the next. It starts almost black, turns mustard on breast milk or tan on formula, greens up when iron or vegetables arrive, and browns and firms as solids take over. Nearly all of that range is normal, and a single odd nappy almost never means anything.

What really tells you something is a change that sticks, paired with how your baby is otherwise. A colour that lasts for days, or comes with a baby who is off feeds, unusually sleepy or clearly unwell, is worth a look. The same colour in a baby who is feeding, weeing and content usually is not.

So use the chart to calm the everyday surprises and to recognise the three colours that do need action, rather than to grade every nappy. Green is not a bad mark; brown is not a gold star.

Breast milk, formula and solids each have a signature

A breastfed baby's stool is the loose, mustard-yellow, seedy kind, and it can appear after most feeds or, once feeding is established, only every few days. Both extremes are normal in a baby who is otherwise well, because breast milk leaves little waste behind.

Formula changes the picture: the stool is usually firmer, tan to pale brown, more strongly smelling and less frequent. Iron-fortified formula, and the iron drops many Indian babies are prescribed, often turn it dark green or greenish-black, which surprises parents but is harmless.

Solids, from around six months, bring the biggest shift. The stool darkens, thickens and starts to smell like a grown-up's, and it will faithfully show you what went in, from the orange of carrot to whole bits of sweetcorn. That is a gut still learning to break food down, not a problem.

The three colours that mean call the doctor

Red is the first. Streaks or a maroon tinge can be blood. Sometimes the cause is minor, a small tear from a hard stool, or simply a red food such as beetroot or tomato, but you should not be the one deciding which. Red stool is a same-day call.

Black is the second, with one exception: the tarry black of the first two or three days is meconium and entirely normal. Black that appears once that stage is well past can be digested blood from higher up the gut. Iron can darken stool too, so mention what your baby is taking, but treat unexplained black as a call.

White or chalky-pale is the third and the least known. Stool gets its colour from bile; pale, clay-coloured stool with no yellow or brown can mean too little bile is reaching the gut, which points to a liver or bile-duct problem. It is rare, and it needs checking promptly, not at the next routine visit.

Loose, hard and bright green: usually fine, sometimes not

One very loose, watery nappy is not diarrhoea. Several in a row, especially with vomiting, fewer wet nappies or a baby who seems flat, can be. Keep milk feeds going, give oral rehydration solution (ORS) if your doctor advises, and seek care if it persists or you see signs of dehydration such as a dry mouth, no tears, or a sunken soft spot.

Hard little pellets passed with straining are constipation, common when formula or solids start. Once your baby is on solids you can offer water, and fruit and fibre help, but see a doctor if it keeps happening, there is blood, or your baby is clearly in pain.

Bright, almost frothy green in a breastfed baby is often just a feed heavy on the watery foremilk, or a passing tummy bug, and it settles on its own. It is worth a mention only if it lasts or comes with other symptoms.

How often is normal

There is no single right number. A newborn on breast milk may fill several nappies a day; an older, established breastfed baby may go once every few days, and both are fine as long as the stool stays soft and your baby is comfortable.

Formula-fed babies tend to be more regular and a little firmer. Straining and going red in the face while passing a soft stool is normal in small babies, whose muscles are still learning the job. It is only constipation if what comes out is hard and dry.

The change that matters is a baby who suddenly stops passing stool and is unsettled, has a firm swollen tummy, or is vomiting. That combination is worth a call, whatever the usual pattern was.

Where this fits in your tracking

Nappies are one of four things worth watching in the first year, next to feeds, sleep and growth. The map below shows which tool covers each, and where you are on it now.

Common questions

There are whole bits of food in the nappy. A young gut does not break everything down, and undigested pieces of vegetable or fruit are normal when solids start. Blood, black or pale-white stool is a different matter and needs a doctor.