How Gallstones Are Passed?

What Are Gallstones and Where Do They Form?

The gallbladder is a small, pear-shaped organ tucked beneath the liver. Its main job is to store bile, a digestive fluid produced by the liver that helps break down fats. Bile contains cholesterol, bile salts, and a waste product called bilirubin. When the balance of these components shifts, solid particles can crystallize and clump together.

These clumps are gallstones. They range in size from a grain of sand to a golf ball. Some people develop one large stone, while others develop many small ones. The two main types are cholesterol stones, which are the most common, and pigment stones, which are made mostly of bilirubin.

Gallstones form silently over months or years. Most people never know they have them. In fact, medical studies consistently show that the majority of people with gallstones remain symptom-free for life. These are called “silent” gallstones, and they usually require no treatment at all.

How Are Gallstones Passed?

Gallstones are passed when they leave the gallbladder and travel through the biliary tract. This tract is a system of ducts that carries bile from the liver and gallbladder into the small intestine. The main pathway is the common bile duct, which is narrow—only about 3 to 6 millimeters in diameter in most adults.

When the gallbladder contracts, usually in response to eating a fatty meal, it squeezes bile out. If a stone is small enough, it can be pushed out of the gallbladder along with the bile. From there, it enters the cystic duct, then moves into the common bile duct, and eventually reaches the duodenum, the first part of the small intestine. Once in the intestine, the stone is carried through the digestive tract and passed in the stool. This is the only true way a gallstone is “passed” without medical intervention.

The problem is that the common bile duct is narrow. A stone that fits through the gallbladder opening may still be too large to pass through the lower end of the common bile duct, where it meets the intestine. When a stone gets stuck there, it blocks the flow of bile. This is called choledocholithiasis, and it is a medical emergency.

What Does Passing a Gallstone Feel Like?

Passing a small stone through the digestive system is often completely painless and unnoticed. The stone simply moves through the intestines and is eliminated. However, when a stone gets stuck in the bile duct, the experience is entirely different.

The blockage causes a sudden, intense pain in the upper right side of the abdomen, right below the ribs. The pain can radiate to the back or the right shoulder blade. It often comes in waves and can last from 30 minutes to several hours. This is known as biliary colic, and it is the classic symptom of a gallstone problem.

Other symptoms of a blocked bile duct include:

• Nausea and vomiting
• Fever and chills
• Jaundice—yellowing of the skin and whites of the eyes
• Dark urine and pale, clay-colored stools
• Rapid heart rate

If a stone passes on its own after causing these symptoms, the pain may suddenly stop. This can create the false impression that the problem is over. But a stone that has blocked the duct once can cause inflammation, infection, or scarring even after it moves. The pancreas is also at risk because the pancreatic duct joins the common bile duct before entering the intestine. A stone blocking this junction can trigger pancreatitis, a serious inflammatory condition.

What Happens When a Stone Gets Stuck?

A stuck gallstone is not something that resolves on its own. The blockage prevents bile from draining, which causes pressure to build up in the liver and gallbladder. This can lead to cholecystitis, which is inflammation of the gallbladder itself. It can also cause cholangitis, an infection of the bile ducts.

Both conditions are serious and require hospital care. Cholangitis in particular can become life-threatening quickly if not treated with antibiotics and drainage. The standard treatment for a stone stuck in the bile duct is a procedure called ERCP, or endoscopic retrograde cholangiopancreatography. During this procedure, a doctor passes a thin tube with a camera through the mouth, down the stomach, and into the small intestine. A small cut is made in the duct opening, and the stone is removed or allowed to pass into the intestine.

This is the only reliable way to “pass” a stone that is causing a blockage. There is no home remedy, no exercise, and no dietary trick that can safely dislodge a stone from the common bile duct. Attempting to force a stone through with pain medication or home treatments delays proper care and increases the risk of complications.

Can You Prevent Gallstones From Forming?

Not all gallstones can be prevented, but certain lifestyle factors are strongly linked to their formation. The most significant risk factor is being overweight or obese. Rapid weight loss is also a known trigger, as it causes the liver to secrete extra cholesterol into bile. Crash diets and very low-calorie diets are particularly risky.

Regular physical activity and a diet rich in fiber, fruits, and vegetables are associated with a lower risk of gallstones. Healthy fats, such as those from olive oil and fish, may help the gallbladder empty regularly, which prevents bile from becoming stagnant and concentrated.

There is no evidence that any supplement, juice, or “liver cleanse” can dissolve existing gallstones or safely flush them out. These claims are widespread online but are not supported by clinical research. In fact, some “gallbladder flushes” that involve drinking large amounts of oil can trigger a gallbladder attack and send a person to the emergency room. The only proven ways to treat symptomatic gallstones are surgical removal of the gallbladder or endoscopic removal of the stone.

When Is Surgery Needed?

If gallstones cause symptoms more than once, the standard recommendation is surgery to remove the gallbladder entirely. This operation is called cholecystectomy. It is one of the most common surgeries performed in the United States, and it is almost always done laparoscopically, meaning through small incisions with a camera.

Removing the gallbladder does not affect digestion in a major way for most people. The liver continues to produce bile, but it drips continuously into the intestine rather than being stored and concentrated. Some people experience looser stools after the surgery, especially after eating fatty meals, but this usually improves over time.

Surgery is not recommended for silent gallstones. The risks of surgery outweigh the small chance that a silent stone will ever cause a problem. The decision to operate is based on symptoms, not on the presence of stones alone.

How Gallstones Are Diagnosed

Ultrasound is the standard first test for gallstones. It is painless, quick, and highly accurate at detecting stones in the gallbladder. If a stone is suspected in the common bile duct, additional imaging such as an MRCP, which is a type of MRI, may be used.

Blood tests are also important. Elevated liver enzymes and bilirubin levels suggest that bile flow is blocked. Elevated white blood cell counts can indicate infection. These tests help doctors decide whether a stone is simply present or actively causing a problem.

It is worth noting that a person can pass a gallstone and never know it. Stones that make it through the duct and into the intestine are eliminated with other waste. They cause no symptoms and require no follow-up. The only stones that matter are the ones that cause pain or block the duct.

What to Do If You Suspect a Gallstone Problem

If you have sudden, severe pain in the upper right abdomen that lasts more than a few hours, seek medical attention. Do not wait to see if it passes. The same applies if the pain is accompanied by fever, jaundice, or vomiting. These are signs of a blocked duct or an infected gallbladder, both of which require urgent treatment.

In the emergency room, you will receive imaging and blood tests to determine the cause of the pain. If a blockage is confirmed, treatment will begin quickly. Delaying care increases the risk of pancreatitis, sepsis, and other serious complications.

For people who know they have gallstones but have never had symptoms, no action is needed. Routine checkups and a healthy lifestyle are sufficient. The vast majority of silent stones will never cause a single day of trouble.