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 Hereditary hemorrhagic telangiectasia
symptoms of Hereditary hemorrhagic telangiectasia
symptom of Chilaiditi syndrome
symptom of Neurofibromatosis
symptom of Scurvy
symptom of Kabuki syndrome
symptom of Giant cell arteritis
symptom of Hereditary angioedema