Apr 27, 2024 ·Hematemesis, or vomiting blood, often presents with a "coffee ground" appearance and can indicate various underlying medical conditions. Hematemesisis the vomiting of blood, which may be obviously red or have an appearance similar to coffee grounds. Melena is the passage of black, tarry stools. Hematochezia is the passage of fresh blood per anus, usually in or with stools. Hematemesisis a very dangerous condition requiring immediate emergency medical treatment in which a person bleeds internally and vomits. Mar 14, 2025 ·Hematemesis isvomiting blood from the digestive tract.It can be caused by various conditions, including cancer, ulcers, cirrhosis, varicose veins and blood thinners. Learn how to recognize hematemesis, when to seek medical help and how it's treated.