If you’ve ever found yourself studying your child’s diaper or pausing at the toilet, you’re not alone. Changes in stool color can catch any parent off guard. One day it looks brown. The next day it’s green. Sometimes it’s bright yellow or even red.

The good news is that many stool color changes in babies and young children are linked to what they eat. At the same time, a few colors may signal that it’s time to check in with your child’s doctor.

Why Food and Drinks Change Stool Color

In babies and young children, stool color is usually influenced more by diet than by disease. Certain foods can noticeably affect color. Red gelatin, fruit drinks, tomato products, beets, red candy and foods with added coloring can turn stool red. Spinach and other leafy vegetables may make it green.

Dark foods like licorice, along with iron supplements or products that contain bismuth, can make stool appear dark or black. Food coloring is a frequent cause of unusual shades.

When a child has diarrhea, stool moves through the digestive tract more quickly. Because of this faster transit, it may look very similar to the color of recently consumed fluids or foods. Green stools are also more common when stools pass quickly through the gut. For these reasons, unusual stool colors are most often related to food, additives or medications.

When Color May Need Medical Attention

Although most color changes are diet-related, a few situations deserve closer attention.

Red and black stools are commonly linked to foods or medications. Most red stools are not caused by blood. However, if there is no clear dietary or medication explanation, these colors should be discussed with your child’s doctor.

Black, tar-like stools may indicate bleeding higher in the digestive tract if they are not connected to iron or certain foods. It is also normal for newborns to pass black, tar-like stools called meconium during the first days of life.

White, light gray or pale yellow stools are less common and should be brought to a doctor’s attention. These colors may be linked to liver or bile duct problems. If they occur more than once, medical advice should be sought. If an unusual color continues for more than 48 hours after stopping a suspected food or medication or if your child looks or acts sick, contact your child’s doctor.

When to Call a Doctor

Contact your child’s doctor if:

• White or light gray stools occur two or more times.
• Red, black or white stool appears without a clear food or medication cause.
• An unusual color lasts more than 24 hours without explanation.
• The color continues more than 48 hours after stopping a suspected food or medication.
• Blood is visible in the stool.
• Diarrhea lasts more than three days.
• Your child is vomiting and cannot drink fluids.
• Your child looks or acts very sick or symptoms are worsening.

Before You Worry

If you are unsure, pause and think about what your child recently ate. Then contact your child’s doctor for guidance. Take a clear photo of the stool and share it when you call or send a message. Asking a simple question and providing that image can help your child’s doctor give you clear next steps.

Sources:

Canadian Digestive Health Foundation
HealthyChildren.org
National Library of Medicine
ScienceDirect