<unk><unk>  often are a sign of an injury or disorder in the digestive tract. Your doctor may use the term "melena" to describe black,<unk> , and foul-smelling<unk>  or "hematochezia" to describe red- or maroon-colored<unk> .<unk> in the<unk> may come from anywhere along your digestive tract, from mouth to anus. It may be present in such small amounts that you cannot actually see it, and it is only detectable by a fecal occult<unk> test.
Black<unk> usually means that the<unk> is coming from the upper part of the gastrointestinal (GI) tract. This includes the esophagus, stomach, and the first part of the small intestine.<unk> will typically look like tar after it has been exposed to the body's digestive juices as it passes through the intestines.
Maroon-colored<unk>  or bright red<unk> usually suggests that the<unk> is coming from the lower part of the GI tract (large bowel, rectum, or anus). However, sometimes massive or rapid bleeding in the stomach causes bright red<unk> .
Bloody or tarry stools
Fever and rash  
Nausea and vomiting
Chronic diarrhea
Vulvar pruritus
Decreased bowel sounds
Rectal pain
Hematochezia