Green stool — when your feces look green — is usually the result of something you ate, such as spinach. Certain medications or iron supplements can also cause green stool.
Newborns pass a dark green stool called meconium, and breast-fed infants often produce yellow-green stools. In older children and adults, green stool is uncommon. It's rarely cause for concern.
Call your doctor if you or your child has green stool for more than a few days. Green stool often occurs with diarrhea, so drink plenty of fluids and seek immediate medical attention if you or your child becomes dehydrated.
May 30, 2018
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- Fischbach FT, et al. Stool studies. In: A Manual of Laboratory and Diagnostic Tests. 9th ed. Philadelphia, Pa.: Lippincott Williams & Wilkins; 2014.