Gastrointestinal bleeding can range from small non-visible amounts, which are only detected by laboratory testing, to massive bleeding where bright red blood is passed and shock develops. Rapid bleeding may cause syncope. The presence of bright red blood in stool, known as hematochezia, typically indicates lower gastrointestinal bleeding. Digested blood from the upper gastrointestinal tract may appear black rather than red, resulting in "coffee ground" vomit or melena. Other signs and symptoms include feeling tired, dizziness, and pale skin color. A number of foods and medications can turn the stool either red or black in the absence of bleeding. Bismuth found in many antacids may turn stools black as may activated charcoal. Blood from the vagina or urinary tract may also be confused with blood in the stool.
complications of Peptic ulcer disease
medical cause of Gastritis
complications of Helicobacter pylori
complications of Crohn's disease
medical cause of Peptic ulcer disease
caption of Plummer–Vinson syndrome
complications of Esophageal varices
symptoms of Helicobacter pylori