<unk>  refers to a particular appearance of vomit.  Blood contains iron within heme molecules in red blood cells. When this iron has been exposed to gastric acid for some time, it becomes oxidized. This reaction causes the vomitus to look like<unk> <unk> .<unk><unk>  vomitus is a classic sign of upper gastrointestinal bleeding.  A peptic ulcer, for example, may bleed into the stomach and produce<unk><unk>  vomitus. When bright red blood is vomited, this is termed hematemesis.
Hematemesis, in contrast to<unk><unk>  vomitus, suggests that upper gastrointestinal bleeding is more acute or more severe, or originates more proximal to the stomach: for example, in the esophagus due to a Mallory-Weiss tear.
Oxidized blood from an upper gastrointestinal bleeding can also be excreted in stool. It produces tarry, blackened stools known as melena.
Coffee ground vomiting
Drooling
Trench mouth
Odynophagia
Odynophagia electrocardiogram
Achlorhydria
Aerophagia
Bloating