Hematemesis

As hematemesis vomiting of blood is called. It can happen due to a fresh bleeding in the esophagus or upper stomach area - eg esophageal varices or a bleeding stomach ulcer, rarely with a stomach cancer - and in these cases is bright red ( hemoglobin) be addressed, including also thought of a pulmonary hemorrhage in which the blood but is usually darker and possibly frothy.

Retrieved from " coffee grounds vomiting " is when hematin is formed by the action of gastric acid from the hemoglobin, which has a brown color.