When this happens, you may vomit blood or have black, tarry stool. Gastrointestinal bleeding is considered a sign of end-stage liver disease, along with bleeding from the nose and gums.

Certain foods and medicines can cause black stool. Sometimes, black stool may even signal bleeding in the digestive tract.

Stools that appear black and tarry typically mean the bleed is further up in your GI tract. Inflammation and ulcers also increase mucus production in the digestive tract, leading to yellow or ...