Why is vomited blood coffee-colored?
May 15, 2023
Source: Cainiu Health
Dr. Zhou Chao
Introduction
Hematemesis with a coffee-ground appearance may be caused by dietary factors, bile reflux, or gastric acid reflux. If large amounts of foods that are close to coffee in color—such as chocolate or black coffee—are consumed, these foods may be expelled along with gastrointestinal contents during vomiting, resulting in vomit that appears coffee-colored. Bile itself is yellowish-green; however, if the patient has underlying conditions such as biliary obstruction or cholecystitis, this may also contribute to the discoloration.
Vomiting blood that appears coffee-colored may be caused by dietary factors, bile reflux, or gastric acid reflux. The specific analysis is as follows:
1. Dietary factors
If a person consumes large amounts of foods with colors similar to coffee, such as chocolate or black coffee, these foods may be expelled along with gastrointestinal contents during vomiting, resulting in vomit that appears coffee-colored.
2. Bile reflux
Bile itself is yellow-green. If a patient has underlying conditions such as biliary obstruction or cholecystitis, bile metabolism may be impaired, leading to bile reflux. When bile mixes with blood, it may produce the aforementioned symptoms.
3. Gastric acid reflux
Infections, environmental factors, and other causes may irritate the gastrointestinal mucosa, resulting in excessive gastric acid secretion. When gastric acid refluxes due to abnormal function of the lower esophageal sphincter, this symptom may occur.
In addition, it could also be caused by gastric mucosal damage, liver cirrhosis, or other conditions. It is recommended that if discomfort symptoms occur in daily life, prompt medical attention should be sought to determine the exact cause and receive targeted treatment.
