What causes vomiting blood

Overview

Vomiting blood, medically termed hematemesis, is a serious symptom that requires immediate medical attention. It signifies bleeding somewhere in the upper gastrointestinal (GI) tract, which includes the esophagus, stomach, and the first part of the small intestine (duodenum). The appearance of the vomited blood can vary significantly, from bright red to dark brown, and it may be mixed with food particles or resemble coffee grounds. This variation often provides clues about the location and severity of the bleeding.

Common Causes of Vomiting Blood

Peptic Ulcers

Peptic ulcers are open sores that develop on the lining of the stomach or the upper part of the small intestine. They are a very common cause of hematemesis. These ulcers can erode into blood vessels, leading to bleeding. Factors contributing to ulcer formation include infection with Helicobacter pylori (H. pylori) bacteria and the long-term use of nonsteroidal anti-inflammatory drugs (NSAIDs) like ibuprofen and aspirin. Symptoms of peptic ulcers can include a burning stomach pain, bloating, and nausea, but bleeding may be the first noticeable sign.

Esophageal Issues

The esophagus, the tube connecting the throat to the stomach, can be a source of bleeding. Several conditions can affect it:

• Esophagitis: Inflammation of the esophagus, often caused by acid reflux (GERD), infections, or certain medications, can lead to irritation and bleeding.
• Esophageal Varices: These are swollen blood vessels in the esophagus, most commonly occurring in people with advanced liver disease, particularly cirrhosis. The increased pressure in the portal vein (which carries blood from the digestive organs to the liver) causes these veins to enlarge. If they rupture, they can cause massive and life-threatening bleeding, leading to hematemesis.
• Mallory-Weiss Tears: These are longitudinal tears in the lining of the esophagus, usually at the junction with the stomach. They are most often caused by forceful or prolonged vomiting, retching, or coughing, which increases pressure in the abdomen and esophagus. While often not severe, they can cause significant bleeding.
• Esophageal Cancer: Tumors in the esophagus can erode into blood vessels, leading to bleeding and vomiting blood.

Gastritis and Duodenitis

Gastritis is inflammation of the stomach lining, while duodenitis is inflammation of the duodenum. Similar to ulcers, these inflammatory conditions can cause irritation and bleeding. Causes can include H. pylori infection, NSAID use, excessive alcohol consumption, and stress.

Vomiting and Retching

Severe or persistent vomiting, even without an underlying ulcer or tear, can sometimes cause enough pressure and irritation to lead to minor bleeding from the stomach or esophageal lining. This is often seen in cases of food poisoning or severe illness.

Other Less Common Causes

While less frequent, other conditions can also lead to vomiting blood:

• Gastric or Duodenal Erosions: Superficial breaks in the lining.
• Vascular Malformations: Abnormalities in blood vessels in the GI tract.
• Pancreatitis: Inflammation of the pancreas can sometimes cause bleeding.
• Trauma: Injury to the abdomen or esophagus.
• Certain Medications: Beyond NSAIDs, other drugs can irritate the GI lining.
• Blood Disorders: Conditions affecting blood clotting.

When to Seek Medical Attention

Vomiting blood is a medical emergency. If you experience hematemesis, you should seek immediate medical care by calling emergency services or going to the nearest emergency room. Do not delay seeking help, as the underlying cause could be life-threatening. Doctors will perform a physical examination, review your medical history, and may order diagnostic tests such as an endoscopy, blood tests, or imaging studies to determine the source and cause of the bleeding.