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en.wikipedia.org/wiki/Coffee_ground_vomiting

Coffee ground vomitus refers to a particular appearance of vomit. Within organic heme molecules of red blood cells is the element iron, and when this iron has been exposed for some time to gastric acid, it becomes oxidized. This reaction causes the vomitus to look like ground coffee.

www.mayoclinic.org/symptoms/vomiting-blood/basics/definition/sym-20050732

Jun 16, 2017 ... Blood in vomit may be bright red, or it may appear black or dark brown like coffee grounds. Swallowed blood, as from a nosebleed or forceful ...

www.healthline.com/symptom/vomiting-blood

Apr 18, 2016 ... Vomiting blood, or hematemesis, is the regurgitation of stomach contents mixed ... CT scan; endoscopy, a device that allows your doctor to look in your stomach; ultrasound; X-ray; MRI .... Stomach Ulcers and What You Can Do About Them ... causing symptoms like heartburn, stomach pain, and burping.

www.healthline.com/health/coffee-ground-vomitus

Jun 28, 2016 ... Coffee ground vomitus is vomit that looks like coffee grounds. This occurs due to the presence of coagulated blood in the vomit. Vomiting blood ...

www.medicalnewstoday.com/articles/314031.php

Nov 11, 2016 ... When caused by bleeding in the upper part of the gut, the blood in the vomit may appear black, dark brown, or like coffee grounds. Black, tarry ...

www.medicinenet.com/vomiting_blood/symptoms.htm

Mar 28, 2017 ... Learn about the causes of hematemesis (vomiting blood) and the medications used in treatment. Pinpoint your symptoms and signs with ...

patient.info/health/vomiting-blood-haematemesis

Dec 10, 2015 ... The medical word for vomiting blood is haematemesis. .... Like stomach ulcers, a duodenal ulcer is usually caused by an infection with the germ ...

www.nhs.uk/conditions/vomiting-blood/Pages/Introduction.aspx

Oct 13, 2016 ... Read about what to do if you're vomiting blood. ... there may be what look like coffee grounds in your vomit, which means the blood has been in ...

www.your.md/condition/vomiting-blood

Vomiting blood is a medical emergency – it means there is bleeding somewhere ... of blood in your vomit, mixed up with food; you may find what look like coffee ... It is a rough guide that should give you a better idea of the problem, but do not ...