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Dark streaks in stool

A 31-year-old male asked:
Dr. Hunter Handsfield
Infectious Disease 54 years experience
Abdominal pain: Any new or unexplained abdominal pain should be professionally evaluated. If "dark gray" is black or nearly so, it could indicate bleeding in the GI t... Read More
A 34-year-old female asked:
Dr. Michael Samach
Internal Medicine - Gastroenterology 51 years experience
Several possibilitie: Stool can be dark from iron pills pepto bismol (bismuth subsalicylate) or foods like spinach. Black tarry stools may indicate bleeding from the stomac... Read More
A 31-year-old member asked:
Dr. Richard Bensinger
Ophthalmology 53 years experience
Diet, blood: Stool will vary from light to dark depending upon the diet. Diets rich is red meat for instance will darken the stool color. If there is GI bleeding... Read More
Dr. Heidi Fowler
Psychiatry 26 years experience
Melena?: Black, malodorous, sticky stool can be due to GI bleeding.
A member asked:
Dr. Marc Lewbart
Emergency Medicine 20 years experience
Dietary sources: often time dark green stools are the result of diet. foods that have blue in them such as blueberries or other blue food coloring can cause dark gree... Read More
A 29-year-old female asked:
Dr. Robert Uyeda
General Surgery 46 years experience
Things that make: black stools include iron, blood, bismuth, charcoal. There are many more things that can make for dark color.
A 32-year-old member asked:
Dr. Charles Cattano
Gastroenterology 40 years experience
Lots to consider...: Color & texture of stool varies with foods, speed of emptying of the GI tract, medications & supplements ingested, gut flora (unique for each individu... Read More
A 42-year-old member asked:
Dr. Alfredo Garcia
Pediatrics 57 years experience
Stool color: Decomposed bile, which is originally green, gives stool its yellow color. Having said that, green stool may mean that bile has rushed through the inte... Read More
A 42-year-old member asked:
Dr. Heidi Fowler
Psychiatry 26 years experience
Black stool: Black stools can be due to medications that contain either iron or bismuth, eating certain foods (like black licorice), Gastrointestinal bleeding or i... Read More
A 47-year-old member asked:
Dr. Charles Cattano
Gastroenterology 40 years experience
Dark stool: Dark-colored stools may result from iron supplements, foods you eat (like a lot of spinach), substances (like peptobismol), but most significantly sug... Read More
A female asked:
Dr.
A Verified Doctoranswered
A US doctor answeredLearn more
Maelena: That is blood that passes thru you GI system and comes out black. Depending on the clinical situation this may be a concern. Other causes include bee... Read More
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