Vomiting blood is the forcing of the stomach contents up through the esophagus (the swallowing tube) and out of the mouth, in which the vomit contains blood.
When blood is vomited, it may appear either a bright red or dark red color. Only blood may be seen, or the blood may come up mixed with food.
Hematemesis; Blood in the vomit
It can sometimes be difficult to tell the difference between vomiting blood and
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