U.S. doctors online nowAsk doctors free
A member asked:

Bright lime green poop? my 2 year old son has been having bright lime green poop it don't even look like poop i have never seen any kids poop like this it has been going on for 3 to 4 months now i take him to to the hospital because he runs fever for no r

1 doctor answer1 doctor weighed in
Dr. Heidi Fowler
Psychiatry 26 years experience
Hello. : Hello. I can’t diagnose the reason for your son’s bright lime green poop. However any thing which causes the feces to transit his system too quickly could cause it to turn green. Bile is yellowish green and it digests fat. As the bile goes through the gut, it turns from green to brown from enzyme action. If it goes through the colon too quickly, there isn’t time for that to occur and the feces are green. Additionally, the fast transit time prevents fluids from being properly reabsorbed through the colon and so the feces is usually loose or liquid as well. Here is a list of possible causes for green feces to peruse: malabsorption, overgrowth of the wrong types of bacteria in the gut (sometimes caused by antibiotics), medication side effects, celiac disease crohn’s disease and iron supplements. Of course anything with green food coloring can be a cause. This is just a small sampling of possible causes. Good luck with this. Take care.
Created for people with ongoing healthcare needs but benefits everyone.
Last updated Oct 3, 2016


Content on HealthTap (including answers) should not be used for medical advice, diagnosis, or treatment, and interactions on HealthTap do not create a doctor-patient relationship. Never disregard or delay professional medical advice in person because of anything on HealthTap. Call your doctor or 911 if you think you may have a medical emergency.