A 65-year-old male asked:
my stool contains black large flakes, say 1/4 inch in size. 1 1/2 days previous history of colon canc 15 yrs ago. anything to be concerned?
2 doctor answers • 4 doctors weighed in
Internal Medicine 38 years experience
Black stool: Black stool or tarry black stool is a sign of upper GI tract bleeding, not from colon, but anyway needs to be evaluated.
Internal Medicine 32 years experience
Stools: Unusual if a foodstuff cannot be blamed then GI eval in order. Unusual presentation but digested blood black. Given history concerned for later.
Last updated May 12, 2019
Connect with a U.S. board-certified doctor by text or video anytime, anywhere.
$15 per month
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.