Why am I vomiting black stuff

Not Medical Advice: Black vomit can be a very serious condition. Vomit that appears black or is darkly colored is most likely a mix of digested blood and the contents of the stomach. When blood mixes with stomach contents, it turns very dark in color and may resemble coffee grounds. Yellow fever, ulcer, throat cancer, H. Pylori and other illnesses can cause black vomit.
Updated on Friday, September 23 2011 at 02:43AM EDT
Source: www.mayoclinic.com/...