Thanks for your query A black, tarry stool (melena) often indicates an upper GI source of bleeding although it could originate from the
small intestine or right colon. Other causes of a
black stool might include iron or ingestion of bismuth (
Pepto-Bismol).
upper GI bleeding could be due to oesahagitis / varices
duodenal and gastric ulcer
bleeding gastric erosions
gastric malignancy etc
Please dont drinkalcohol .It can cause
Gastritis and erosions and also Ulcer
Dont take any pain killers
Dont skip meals ,dont smoke
dont eat very spicy and oily foods
Dont eat food from outside.
See a gastroenterologist doctor and get an upper GI
endoscopy as soon as possible and follow his advice.