Esophageal varices are enlarged veins in the lower part of the esophagus. They usually develop because pressure builds up in the portal venous system, most often as a result of advanced liver disease or cirrhosis. ^[1][2][3][4]

The main concern is bleeding. Variceal bleeding can be sudden, severe, and life-threatening, which is why people at risk often need monitoring and preventive treatment even before a bleed happens. ^[1][2]

Why do esophageal varices form?

When blood flow through the liver becomes difficult, portal pressure rises and blood is redirected through smaller vessels, including veins in the esophagus. Over time those veins enlarge and become fragile. ^[1][2][3]

Not every patient with liver disease develops severe varices at the same time or at the same rate. The degree of portal hypertension and overall liver status influence risk. ^[2][4]

What symptoms can occur?

Unruptured varices often cause no symptoms at all. The first sign may unfortunately be bleeding. When bleeding occurs, vomiting blood, black tarry stools, dizziness, weakness, or fainting can appear. ^[1][2][4]

Because these signs may represent a gastrointestinal emergency, they require immediate medical attention. ^[1][2]

How are esophageal varices diagnosed?

Upper endoscopy is the main way to identify and assess varices. It helps estimate bleeding risk and guide treatment. People with cirrhosis may undergo screening endoscopy based on guideline recommendations. ^[2][3]

The broader evaluation also includes assessing liver disease severity, portal hypertension, and related complications. ^[1][3]

How are they treated or prevented?

Nonselective beta blockers and endoscopic band ligation are common preventive strategies in selected patients. If active bleeding occurs, emergency treatment may include resuscitation, medications, urgent endoscopy, and additional interventions depending on severity. ^[1][2][3]

Treatment plans are tied closely to the person’s liver disease status, so hepatology or gastroenterology follow-up is important. ^[2][4]

When should emergency care be sought?

Emergency care is needed immediately for vomiting blood, black stools, severe dizziness, fainting, or signs of shock. In high-risk patients with cirrhosis, even milder bleeding symptoms should be taken seriously. ^[1][2]

Esophageal varices are an example of why chronic liver disease needs proactive follow-up: the most dangerous complication may appear before the patient feels much else. ^[1][3]

FAQ

Do esophageal varices always cause symptoms?

No. Many people have no symptoms until bleeding occurs. ^[1][2]

Why are they dangerous?

They are dangerous because they can rupture and cause severe bleeding. ^[1][3]

How are varices found?

They are usually detected with upper endoscopy. ^[2][3]

Can bleeding be prevented?

In many patients, yes. Preventive treatment such as beta blockers or band ligation may be used. ^[2][3]

When is it an emergency?

Vomiting blood, black stools, fainting, or shock symptoms require emergency care. ^[1][2]