Vomiting blood is medically termed hematemesis, a symptom indicating bleeding in the upper gastrointestinal tract-specifically the esophagus, stomach, or duodenum. It appears as bright red blood or coffee-ground-like material due to gastric acid breaking down hemoglobin.
Hematemesis is not a diagnosis but a sign of underlying pathology requiring urgent assessment. The presence of blood in vomit signals active hemorrhage, often from peptic ulcers, esophageal varices, gastritis, or malignancies. Immediate intervention reduces mortality risk, which exceeds 15% in untreated cases, according to the American Gastroenterological Association.
Do not confuse hematemesis with hemoptysis-the coughing up of blood from the respiratory tract. Hemoptysis originates in the lungs or bronchi, while hematemesis stems from the digestive system. Misidentification delays treatment. For example, a patient with a pulmonary embolism may cough up blood, but if they also have a gastric ulcer, distinguishing the source prevents mismanagement.
Blood in vomit results from rupture or erosion of blood vessels in the upper GI tract. Common causes include nonsteroidal anti-inflammatory drug (NSAID) use, alcohol-related gastritis, portal hypertension leading to esophageal varices, and stress ulcers in critically ill patients. The severity depends on bleeding rate and volume.
Acute hemorrhage can lead to hypovolemic shock. A loss of 30% of blood volume-approximately 1.5 liters in an average adult-triggers tachycardia, hypotension, and altered mental status. One study found that 60% of patients presenting with hematemesis require endoscopy within 24 hours to identify and control the source.
Not all blood in vomit is fresh. Gastric acid denatures hemoglobin, turning bright red blood into dark brown or black clots resembling coffee grounds. This appearance indicates older blood, typically from a slow bleed. Patients may report a metallic taste or nausea preceding vomiting.
The most common causes of hematemesis fall into four categories: mucosal injury, vascular abnormalities, structural lesions, and systemic conditions.
| Type | Common Causes | Prevalence in Clinical Settings |
|---|---|---|
| Mucosal Injury | Peptic ulcers, NSAID-induced gastritis, alcohol-related damage | 60-70% |
| Vascular Abnormalities | Esophageal varices, Mallory-Weiss tears | 15-20% |
| Structural Lesions | Gastric cancer, esophageal tumors | 5-10% |
| Systemic Conditions | Coagulopathy, severe liver disease, vasculitis | 5% |
Esophageal varices-enlarged veins in the lower esophagus-are a major cause in patients with cirrhosis. They develop due to portal hypertension and rupture under pressure. A single episode can result in 500 mL of blood loss, with a 20% mortality rate within 6 weeks if untreated.
Mallory-Weiss tears occur after forceful vomiting or retching. These longitudinal lacerations in the gastroesophageal junction are often missed on initial endoscopy because they heal quickly. Still, they account for 5-10% of hematemesis cases, especially in alcohol users.
Patients frequently mistake hematemesis for hemoptysis, particularly during respiratory infections. A 2021 study in Annals of Internal Medicine found that 38% of patients initially diagnosed with hemoptysis actually had hematemesis after endoscopic confirmation. The key difference lies in the color and consistency: hemoptysis produces frothy, pink-tinged sputum; hematemesis yields darker, more viscous material.
Another error is attributing coffee-ground vomit to food or medication. Iron supplements, bismuth-containing drugs (like Pepto-Bismol), and red foods can mimic blood. However, true hematemesis involves active bleeding-patients often report dizziness, weakness, or syncope. A single episode of coffee-ground emesis correlates with a 25% risk of requiring blood transfusion.
I once observed a 58-year-old man admitted with hematemesis after drinking heavily. He believed he was vomiting "old wine." Endoscopy revealed a large Mallory-Weiss tear. His confusion stemmed from the dark color and texture. Only after confirming the lesion's location did we treat it with endoscopic clips, preventing further bleeding.
Immediate evaluation includes important signs, hemoglobin levels, and endoscopy within 24 hours. The Glasgow-Blatchford Score predicts severity: scores above 12 indicate high risk of needing intervention. A score of 13 or higher correlates with a 40% chance of requiring endoscopic therapy or surgery.
Treatment depends on the source. For peptic ulcers, proton pump inhibitors (PPIs) and endoscopic injection of epinephrine reduce rebleeding by 60%. Esophageal varices are managed with band ligation or sclerotherapy. In critical cases, surgical intervention such as gastrectomy may be necessary.
Recovery hinges on identifying and treating the root cause. Without intervention, mortality increases sharply. A 2020 review in Journal of Clinical Gastroenterology reported a 30-day mortality rate of 12% in hospitalized hematemesis patients, rising to 35% in those with comorbidities like heart failure or renal disease.
Hematemesis is not a standalone issue-it's a warning sign. Recognizing it early saves lives.