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.
symptom of Gastric antral vascular ectasia
symptom of Stomach cancer
symptom of Gastroesophageal reflux disease
symptom of Esophageal cancer
symptom of Helicobacter pylori
symptom of Hiatal hernia
medical cause of Peptic ulcer disease
symptoms of Helicobacter pylori