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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.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.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 ...

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.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.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.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 ...

medlineplus.gov/ency/article/003118.htm

Jan 11, 2015 ... Read our article and learn more on MedlinePlus: Vomiting blood. ... was in the vomit? What color was the blood? (Bright or dark red or like coffee grounds?) ... What medical conditions do you have? What medicines do you ...