What Are Signs of Variceal Bleeding in Biliary Atresia?

The internal bleeding your doctor warned you about is a serious complication caused by portal hypertension. In biliary atresia, the liver can develop progressive scarring, and the small blood vessels inside the liver may become compressed or narrowed ^[1][2]. This creates resistance, making it harder for blood to flow smoothly through the liver. Because blood must still find a way back to the heart, it backs up, causing the pressure in the portal vein (the main vein carrying blood from the intestines to the liver) to rise ^[2]. This high pressure forces blood to take “detours” through smaller veins, often in the stomach and lower esophagus. These veins swell and stretch into fragile vessels called varices ^[3][4].

How Varices Lead to Bleeding

While having varices does not mean a bleed is guaranteed to happen, these swollen veins have thin walls that are not designed to handle high-pressure blood flow. Depending on the size of the varix, the tension on its walls, and the overall pressure in the portal system, a varix can leak or burst open ^[4][5].

When this happens, blood empties directly into the digestive tract. You might notice two main signs:

• Vomiting blood (hematemesis): Depending on the rate and location of the bleed, your child may vomit bright red blood or darker material that looks like coffee grounds ^[5].
• Black, tarry stools (melena): If the blood travels down through the stomach and intestines, the digestion process can turn the blood thick, sticky, and pitch-black ^[5]. While things like iron supplements can also cause dark stools, you should never assume a dark, tarry stool is harmless if your child has portal hypertension.

Recognizing a Medical Emergency

A variceal bleed is a life-threatening medical emergency. A child can lose a significant amount of blood very quickly, leading to a dangerous drop in blood pressure (hemodynamic instability), breathing problems, or even death ^[6][7].

Do not wait to see if the bleeding happens again. Call 911 (or your local emergency number) immediately if your child vomits blood, passes black/tarry stools, or shows signs of severe blood loss, such as:

• Extreme paleness (pallor) or cold, clammy skin
• Fainting, unusual sleepiness, or confusion
• Fast breathing or a very fast heartbeat
• A large amount of red or maroon blood in the stool

While waiting for help, keep your child calm and positioned safely if vomiting, and follow the emergency plan provided by your liver team. Do not drive to the hospital yourself if your child seems unstable, and do not delay care to drive further to a specialized hospital—any emergency department can begin stabilization.

What Happens in the Hospital

Emergency care focuses first on stabilizing your child. Depending on the child’s age, size, and condition, the emergency team may protect their airway, give intravenous (IV) fluids or blood products through a vein to support blood pressure, and administer specific IV medications like octreotide to reduce blood flow to the gut ^[8][9].

Once the child is stabilized, a pediatric gastroenterologist (a children’s digestive and liver specialist) will typically perform an endoscopy ^[8][10]. This is a procedure where a flexible camera is passed through the mouth while the child is sedated or anesthetized to locate the bleeding varix. Depending on the child’s size and the location of the varix, the doctor may place tiny rubber bands around the vein to stop the bleeding, though treatment methods can vary based on individual anatomy ^[10].

Ongoing Monitoring

Because varices can be present without causing symptoms, regular monitoring is crucial. Your liver team will recommend a schedule for screening endoscopies to check for new or growing varices and may discuss preventive treatments to lower the risk of a future bleed ^[11][5].