Biliary Colic: What It Is, Symptoms, Causes, and How to Manage It

Have you ever felt a sudden, intense pain in your upper abdomen, almost like a cramp that won’t go away? It could be biliary colic, a condition that affects 10-15% of the population globally.

Biliary colic occurs when gallstones or other issues in the gallbladder obstruct the bile duct, triggering severe pain. The discomfort can be sharp, persistent, and often radiates to the back or shoulder. While it’s a common issue, many people aren’t familiar with it, and its symptoms can easily be overlooked or mistaken for other abdominal conditions.

This condition is closely related to gallstones, which form when there is an imbalance in substances that make up bile, such as cholesterol or bilirubin. In fact, 80% of people with biliary colic have gallstones. When a stone temporarily blocks the bile duct, it causes the gallbladder to contract, leading to the classic pain of biliary colic. Though the pain typically comes and goes, it can be incredibly intense, often lasting for 30 minutes to several hours.

The symptoms of biliary colic may include sharp pain in the upper right side of the abdomen, nausea, vomiting, and bloating. It often occurs after eating a fatty meal, as the gallbladder releases bile to digest fat. For many, these painful episodes seem to strike unexpectedly, making it crucial to understand the causes and how to manage them before the condition worsens.

While biliary colic itself may not be life-threatening, it can indicate a more serious issue, such as gallbladder disease or chronic gallstones. Managing biliary colic involves a combination of lifestyle changes, diet adjustments, and, in some cases, medical intervention. In this article, we’ll dive deeper into biliary colic, exploring its symptoms, causes, and practical tips for managing it effectively.

What is Biliary Colic?

Biliary colic is a type of intense abdominal pain that originates from the gallbladder and is distinguished by its temporary nature, caused by a gallstone blocking a bile duct. This condition represents a symptomatic manifestation of cholelithiasis (gallstones) but is distinct from acute inflammation or infection of the gallbladder.

The pathophysiology involves a precise sequence of events initiated by gallbladder contraction. When a meal, particularly one high in fat, is consumed, it stimulates the release of cholecystokinin (CCK) from the small intestine into the bloodstream. This hormone acts directly on the smooth muscle of the gallbladder wall, causing it to contract powerfully to eject bile into the cystic duct.

If gallstones are present, this contraction can propel a stone into the narrow opening of the cystic duct, creating a functional blockage. The gallbladder muscle continues to contract against this immovable obstruction, causing a rapid rise in intra-gallbladder pressure.

This distension of the gallbladder and the cystic duct stimulates visceral nerve fibers, which transmit pain signals to the central nervous system. This pain is typically perceived in the upper right quadrant of the abdomen, just below the rib cage, because this is the anatomical location of the gallbladder.

In some cases, the pain can be referred to other areas, such as the right shoulder or the area between the shoulder blades (the interscapular region). This referred pain occurs due to shared neural pathways; the phrenic nerve, which innervates the diaphragm near the gallbladder, has roots in the same spinal segments (C3-C5) that supply sensation to the shoulder area.

The defining characteristic of biliary colic is its temporary nature. The episode resolves when the gallbladder muscle fatigues and relaxes, allowing the obstructing stone to fall back into the wider part of the gallbladder, thereby relieving the pressure and pain.

Biliary Colic vs. Cholecystitis

Biliary colic is not the same as cholecystitis; biliary colic involves a temporary blockage without inflammation, while cholecystitis involves a persistent blockage that leads to gallbladder inflammation and potential infection. Although both conditions are caused by gallstones and present with upper abdominal pain, they represent different points on a spectrum of gallbladder disease and have significantly different clinical implications and levels of urgency.

Specifically, biliary colic is a mechanical issue. The pain is caused purely by the pressure from a temporary obstruction. The episode typically lasts for a few hours at most, and once the stone dislodges, the symptoms resolve completely, and the gallbladder returns to its normal, non-inflamed state.

There are no signs of systemic illness, such as fever or an elevated white blood cell count, because there is no underlying inflammation or infection. Patients often feel completely well between attacks.

In contrast, acute cholecystitis occurs when a gallstone remains impacted in the cystic duct for a prolonged period, typically longer than four to six hours. This sustained blockage prevents bile from leaving the gallbladder, leading to bile stasis.

The trapped bile irritates the gallbladder lining, triggering an inflammatory chemical cascade. This inflammation causes the gallbladder wall to become swollen, thickened, and tender.

The stagnant bile can also become a breeding ground for bacteria, leading to a secondary infection. Consequently, symptoms of cholecystitis are more severe and persistent. They include constant, unremitting pain in the upper right abdomen, marked tenderness when the area is touched (a clinical sign known as a positive Murphy’s sign), fever, chills, and an elevated white blood cell count on lab tests.

Cholecystitis is a more serious medical condition that requires urgent medical attention and often hospitalization, as it can lead to complications like gallbladder perforation, abscess formation, or sepsis if left untreated.

Common Symptoms of Biliary Colic

Sudden and Severe Abdominal Pain

The pain begins without warning, often waking a person from sleep or occurring a few hours after a heavy or fatty meal. It rapidly intensifies, reaching a plateau of severe, constant ache.

The location is typically in the right upper quadrant (RUQ) or the epigastrium (the upper central part of the abdomen, just below the sternum). Patients often describe it as a deep, gnawing, or boring pain that makes it difficult to find a comfortable position.

Radiating Pain

In a significant number of cases, the pain is not confined to the abdomen. It classically radiates, or refers, to other areas. The most common site of referred pain is the right shoulder or the tip of the right scapula (shoulder blade).

This phenomenon occurs because the phrenic nerve, which supplies the diaphragm and the capsule surrounding the gallbladder and liver, shares the same spinal cord nerve roots (C3-C5) as the nerves that supply sensation to the shoulder. The brain misinterprets the origin of the pain signals, attributing them to the shoulder. Pain may also be felt in the back, between the shoulder blades.

Nausea and Vomiting

The intense visceral pain and distension of the biliary system often trigger the vomiting center in the brain. Nausea is extremely common, and vomiting occurs in many individuals. However, vomiting does not typically relieve the pain, as the underlying cause—the mechanical obstruction—is unaffected.

What Does Biliary Colic Pain Feel Like?

The pain of biliary colic is described as a constant, intense, and severe ache or pressure, often characterized as cramping or gnawing rather than a sharp, stabbing sensation. It begins abruptly, escalates quickly, and persists at a high level of intensity for a period typically lasting from 30 minutes to several hours before gradually subsiding.

Many patients describe the feeling as if a ball is lodged under their right ribs, being squeezed tightly. The term “colic” can be misleading because it suggests intermittent, wave-like pain, which is characteristic of intestinal or renal colic.

Biliary colic, however, is not intermittent. The pain profile involves a rapid crescendo to a peak intensity, a sustained plateau of severe pain, and then a gradual decrescendo as the episode resolves. During the plateau phase, the pain is relentless. Movement does not alleviate it, and patients often find themselves pacing or writhing in an attempt to find a position of comfort, usually without success.

The onset frequently occurs at night or a few hours after consuming a meal rich in fats. The link to fatty meals is physiological: fat in the small intestine stimulates the release of the hormone cholecystokinin (CCK), which causes the gallbladder to contract forcefully. This strong contraction increases the likelihood that a gallstone will be pushed into the cystic duct, causing a blockage.

The nocturnal timing may be related to changes in bile composition and gallbladder motility that occur during periods of fasting overnight. Once the attack begins, it typically lasts for at least 30 minutes. An episode that persists for more than 5 to 6 hours should raise suspicion for a complication, such as acute cholecystitis.

Causes of Biliary Colic

Gallstones

Gallstones cause a gallbladder attack by physically obstructing the cystic duct, the narrow channel through which bile exits the gallbladder, leading to distension and intense pressure when the gallbladder contracts. This process is a purely mechanical one, where a stone acts as a temporary plug, triggering a painful response from the organ’s muscular walls.

Gallstones are hardened deposits of digestive fluid. They can range in size from as small as a grain of sand to as large as a golf ball. The vast majority of gallstones fall into two main categories: cholesterol stones and pigment stones.

Cholesterol stones, which are yellowish-green, are the most common type and form when the bile contains too much cholesterol, too much bilirubin, or not enough bile salts. These imbalances lead to the supersaturation of cholesterol, which then crystallizes and hardens over time.

Pigment stones are smaller, darker stones made of bilirubin. They tend to develop in people who have conditions that cause an excess of bilirubin, such as cirrhosis of the liver, biliary tract infections, or hereditary blood disorders like sickle cell anemia.

Once these stones have formed and are present in the gallbladder, they create the potential for biliary colic. An attack is precipitated when the gallbladder contracts, propelling a stone into the narrow outlet known as the cystic duct. This event acts like a cork in a bottle, preventing bile from flowing out and causing a rapid increase in pressure within the gallbladder, which in turn causes the characteristic severe pain.

The gallbladder’s primary function is to store and concentrate bile produced by the liver. After a meal, particularly one containing fats, hormonal signals (primarily cholecystokinin, or CCK) instruct the gallbladder to contract and release bile into the small intestine to aid in digestion. In an individual with cholelithiasis (gallstones), these contractions can mobilize the stones within the gallbladder.

If a stone is small enough to enter the cystic duct but too large to pass through it easily, it becomes lodged. The smooth muscle of the gallbladder wall, responding to the CCK signal, continues to contract vigorously against this unyielding obstruction. This forceful, futile contraction causes the pressure inside the gallbladder to rise dramatically.

The stretching of the gallbladder wall and the cystic duct stimulates visceral pain receptors, which transmit signals of severe pain to the brain. The pain persists as long as the stone remains impacted and the gallbladder continues its contractile efforts.

The attack subsides only when the gallbladder muscle fatigues and relaxes, decreasing the pressure on the stone and allowing it to dislodge and fall back into the larger main body of the gallbladder. At this point, bile flow is restored, the pressure is relieved, and the pain resolves.

Consumption of Large or High-fat Meals

The physiological mechanism is centered on the digestive hormone cholecystokinin (CCK). When dietary fats and amino acids enter the first part of the small intestine (the duodenum), cells in the intestinal lining release CCK into the bloodstream.

CCK has several functions, but its most potent effect is on the biliary system, where it signals the gallbladder to contract forcefully and the sphincter of Oddi (the muscular valve controlling bile flow into the intestine) to relax. This coordinated action is designed to deliver a bolus of concentrated bile precisely when it is needed for fat digestion.

In a person with gallstones, a meal high in fat such as fried foods, heavy creams, or rich desserts causes a particularly strong surge of CCK and, consequently, a very powerful gallbladder contraction. This increases the likelihood that a pre-existing stone will be propelled into and become lodged in the narrow cystic duct.

Other triggers can include rapid weight loss. During periods of fasting or very low-calorie intake (as seen with crash diets or after bariatric surgery), the gallbladder contracts less frequently, leading to bile stasis.

Simultaneously, the body’s metabolism of fat stores can lead to the liver secreting more cholesterol into the bile. This combination of bile stasis and cholesterol supersaturation is a perfect storm for gallstone formation and can precipitate an attack when normal eating resumes.

Biliary Colic Treatment

Immediate Management Options for Biliary Colic

Immediate management for biliary colic focuses on three key areas: providing effective pain relief, resting the gallbladder by fasting, and monitoring for signs of complications that require emergency care. These steps are designed to make the patient comfortable while the temporary obstruction resolves on its own.

The intense pain of biliary colic requires potent analgesia. Nonsteroidal anti-inflammatory drugs (NSAIDs), such as ketorolac or diclofenac, are often the first-line choice in a medical setting. NSAIDs are particularly effective because they not only relieve pain but also inhibit prostaglandins, which play a role in gallbladder muscle contraction and inflammation.

For pain that is not controlled by NSAIDs, opioid analgesics like morphine or hydromorphone may be administered. For at-home care before seeking medical attention, over-the-counter NSAIDs like ibuprofen may provide some relief.

To allow the gallbladder to rest, patients are instructed to avoid all food and drink (go “NPO,” or nil per os, meaning nothing by mouth). Consuming food or liquids, especially fats, will trigger the release of cholecystokinin (CCK), causing the gallbladder to contract further and potentially worsening the pain and obstruction. Resting the bowel prevents this hormonal stimulation, allowing the gallbladder muscle to relax, which can help the impacted stone to dislodge.

Additionally, applying a warm compress or heating pad to the upper abdomen can sometimes help soothe the associated muscular discomfort. It is critical, however, to know when to seek emergency medical care.

If the pain persists for more than six hours, or if it is accompanied by fever, chills, persistent vomiting, or the development of jaundice (yellowing of the skin and eyes), this suggests a progression from simple biliary colic to a more serious complication like acute cholecystitis or a blockage of the common bile duct, which requires immediate medical intervention.

Long-term Medical Treatments for Recurrent Gallbladder Attacks

The definitive long-term medical treatment for recurrent gallbladder attacks is laparoscopic cholecystectomy, the surgical removal of the gallbladder, which is considered the gold standard for preventing future episodes. While non-surgical options exist, they are reserved for a small group of patients who cannot undergo surgery.

Firstly, Laparoscopic Cholecystectomy (gold standard) minimally invasive surgical procedure is the most common and effective treatment for symptomatic gallstones. A surgeon makes several small incisions in the abdomen and inserts a laparoscope, a thin tube with a camera, and specialized surgical tools.

The gallbladder is then detached and removed through one of the incisions. The procedure offers a permanent cure for biliary colic with a very high success rate.

Because it is minimally invasive, it results in less pain, a shorter hospital stay (often same-day discharge or one overnight stay), and a faster recovery compared to traditional open surgery. The body adapts well to the absence of a gallbladder; the liver continues to produce bile, which then flows directly into the small intestine instead of being stored first.

Besides, open Cholecystectomy is a traditional surgical approach involving a single, larger incision in the upper right abdomen to remove the gallbladder.

It is now typically reserved for cases where laparoscopic surgery is not feasible, such as in patients with severe inflammation, extensive scarring from previous abdominal surgeries, or certain anatomical anomalies. Recovery from open surgery is longer and more painful.

Non-surgical options are considered only for patients who are at high risk for complications from surgery. They can apply oral dissolution therapy. This involves taking medications containing bile acids, such as ursodeoxycholic acid (UDCA), to dissolve cholesterol gallstones.

This treatment is a slow process, often taking months or even years to be effective. It is only suitable for patients with small, non-calcified cholesterol stones and a functioning gallbladder. A major drawback is the high rate of stone recurrence once the medication is stopped.

In non-surgical solution, doctors can apply Endoscopic Retrograde Cholangiopancreatography (ERCP). This procedure is not a primary treatment for biliary colic originating from the gallbladder but is crucial for removing gallstones that have migrated out of the gallbladder and become lodged in the common bile duct, a condition known as choledocholithiasis, which can cause jaundice and pancreatitis.

Biliary Colic Diagnosis

To accurately diagnose the cause of a gallbladder attack and rule out other conditions, healthcare providers rely on a specific set of diagnostic tools.

The primary and most common imaging test is the abdominal ultrasound. This non-invasive procedure uses sound waves to create images of the gallbladder and surrounding organs. It is highly effective at detecting gallstones (cholelithiasis), identifying gallbladder wall thickening, which can indicate inflammation (cholecystitis), and checking for dilation of the bile ducts.

Alongside imaging, blood tests are performed to provide a broader clinical picture. A complete blood count (CBC) can show an elevated white blood cell count, signaling an infection or significant inflammation.

Liver function tests (LFTs) measure levels of bilirubin, enzymes like ALT and AST, and alkaline phosphatase, which can be elevated if a stone is obstructing the common bile duct. Pancreatic enzyme levels (amylase and lipase) are also checked to ensure the pancreas is not inflamed.

For cases where the diagnosis is less clear, a Hepatobiliary Iminodiacetic Acid (HIDA) scan, or cholescintigraphy, may be ordered. This nuclear medicine scan assesses gallbladder function by tracking the flow of a radioactive tracer from the liver into the gallbladder and small intestine. It can diagnose a blocked cystic duct or a poorly functioning gallbladder, a condition known as biliary dyskinesia.

Who Is Most At Risk for Developing Biliary Colic?

The risk of developing biliary colic and gallstones is not uniform across the population; certain demographic and physiological factors significantly increase susceptibility.

A well-known mnemonic in medicine to summarize the classic risk factors is the “4 Fs”: Female, Forty, Fertile, and Fat. Women are two to three times more likely than men to develop gallstones, largely due to the influence of the hormone estrogen, which increases cholesterol in the bile and reduces gallbladder motility.

The risk also climbs with age, particularly after forty. The term “fertile” refers to the impact of pregnancy, as hormonal shifts and increased pressure on the abdomen can promote stone formation. Finally, being overweight or obese (fat) is a major risk factor because it increases cholesterol saturation in the bile, which is the primary component of most gallstones.

Beyond this classic profile, other factors play a significant role. Rapid weight loss, often seen after bariatric surgery or from very low-calorie diets, paradoxically increases risk because the liver metabolizes fat quickly, releasing excess cholesterol into the bile.

A family history of gallstones suggests a genetic predisposition. Certain ethnic groups, including Native Americans and individuals of Hispanic descent, have a higher genetic risk. Medical conditions such as diabetes, Crohn’s disease, and cirrhosis also elevate the likelihood of developing gallstones.

Biliary Colic Pain and A Heart Attack or Pancreatitis

Distinguishing the intense pain of biliary colic from other serious medical emergencies like a heart attack or acute pancreatitis is critical, as the required treatments are vastly different. While all can cause severe upper abdominal or chest discomfort, key differences in the location, character, and associated symptoms help in differential diagnosis.

Biliary colic pain is most characteristically located in the upper right quadrant (RUQ) of the abdomen, just below the rib cage, or in the epigastric (upper-middle) region. The pain is often described as a steady, severe ache or cramping that can radiate to the right shoulder or between the shoulder blades. It typically begins suddenly, often after a fatty meal, and can be accompanied by nausea and vomiting.

In contrast, the pain of a heart attack (myocardial infarction) is usually felt in the center of the chest and is described as a pressure, tightness, squeezing, or crushing sensation. This pain commonly radiates to the jaw, neck, back, and one or both arms (most often the left).

Associated symptoms include shortness of breath, cold sweats, and lightheadedness, which are less typical of a gallbladder attack. Acute pancreatitis presents with severe, constant, and often boring pain in the epigastric area that famously radiates directly through to the back.

Patients frequently report that leaning forward provides some relief. Severe nausea, persistent vomiting, fever, and a rapid heart rate are common, and the abdomen is often exquisitely tender to the touch.

How to Prevent Biliary Colic Without Surgery

To some extent, gallbladder attacks can be prevented or their frequency reduced through non-surgical, lifestyle-based strategies, especially for individuals who are at risk but have not yet developed significant symptoms.

However, it is important to understand that these measures primarily work by preventing the formation of new gallstones or avoiding the triggers that cause existing stones to become symptomatic; they do not eliminate large, pre-existing stones.

The cornerstone of prevention is maintaining a healthy weight through gradual, sustainable weight loss. Crash dieting and rapid weight loss should be avoided, as they can promote gallstone formation.

Adopting a gallbladder-friendly diet is equally crucial. This involves reducing the intake of foods high in saturated fats, cholesterol, and refined sugars, such as fried foods, fatty meats, and processed snacks. These foods stimulate the gallbladder to contract forcefully, increasing the chance that a stone will be pushed into a bile duct and cause a blockage.

Instead, a diet rich in fiber from fruits, vegetables, and whole grains helps improve digestive health and can reduce the risk of stone formation.

Including healthy fats, like those found in olive oil, avocados, and nuts, in moderation is also beneficial. Staying well-hydrated by drinking plenty of water helps keep the bile fluid and less concentrated, making it less likely to form stones. Regular physical exercise supports weight management and improves overall metabolic function, further lowering the risk.

FAQs

1. What is the biliary colic ICD 10?

The ICD-10 code for biliary colic is K80.1, which is used to classify biliary colic caused by gallstones blocking the bile ducts. This condition leads to sharp abdominal pain, often felt in the upper right quadrant, as the gallbladder tries to expel bile but is obstructed by the stone.

Recognizing this specific code helps healthcare providers identify the condition for proper diagnosis, treatment, and billing, and is part of ensuring effective management and care.

2. What is medicine for biliary colic?

When it comes to treating biliary colic, the focus is primarily on managing pain and alleviating symptoms. Common medicines for biliary colic include nonsteroidal anti-inflammatory drugs (NSAIDs) such as ibuprofen, which help reduce inflammation and relieve pain.

In more severe cases, stronger prescription medications like opioid pain relievers may be prescribed to provide relief during acute attacks. Antispasmodics like hyoscine butylbromide can also be helpful for relaxing the muscles in the gallbladder and bile duct, easing spasms.

If gallstones are the underlying cause, surgical removal of the gallbladder, known as cholecystectomy, may be considered.

3. Does drinking water help biliary colic?

Drinking plenty of water can provide some benefits to individuals with biliary colic, but it won’t directly relieve the pain caused by gallstones blocking the bile duct. However, staying well-hydrated supports the body’s natural detoxification process, helps improve bile flow, and may reduce the formation of gallstones.

Additionally, hydration can help reduce dehydration, which might exacerbate symptoms like nausea or vomiting associated with biliary colic. Drinking water should be part of a healthy lifestyle to support digestion and overall well-being, but it’s important to seek medical attention for effective treatment of the pain.

4. What foods trigger gallstone attacks?

Certain foods can act as triggers for gallstone attacks and biliary colic symptoms, particularly those high in fat and cholesterol. Fried foods, red meat, full-fat dairy, and sugary foods are some of the primary culprits. These foods stimulate the gallbladder to release bile, and if a gallstone is present, this may lead to obstruction and pain.

Processed foods, refined carbohydrates, and alcohol can also increase the risk of developing gallstones. Eating a diet rich in fiber, lean proteins, and low-fat dairy can help prevent gallstone formation and manage symptoms of biliary colic.

5. What foods should you eat to avoid biliary colic?

To prevent biliary colic and maintain overall digestive health, it’s important to eat a low-fat diet and focus on nutrient-dense, easily digestible foods. Fruits, vegetables, whole grains, and lean proteins like chicken, turkey, and fish are great options.

Incorporating fiber-rich foods, such as beans, lentils, and oats, can promote regular bowel movements and prevent bile stagnation, which may reduce the likelihood of gallstone formation. A well-balanced diet can also help maintain a healthy weight, which is essential for preventing gallstones and managing biliary colic symptoms.

6. Why does biliary colic happen at night?

Biliary colic often occurs at night due to changes in how the body processes food and bile. During sleep, the body’s digestive processes slow down, and the gallbladder may not empty bile as effectively, which can lead to the formation of blockages. This may result in the sharp pain and discomfort typically associated with biliary colic.

Additionally, many people eat larger meals or foods that are high in fat earlier in the day, and the delayed digestion at night can exacerbate symptoms. The position of the body while lying down can also increase pressure on the abdomen, triggering pain.

7. Can biliary colic last a few days?

While biliary colic usually lasts a few hours, it can sometimes persist for a few days, especially if the underlying condition, such as gallstones, is not addressed. If a gallstone is partially blocking the bile duct, symptoms may flare up intermittently and cause discomfort.

In some cases, untreated biliary colic can lead to more serious conditions, such as cholecystitis (inflammation of the gallbladder), which may cause symptoms to persist for days. Seeking medical attention is essential if symptoms don’t resolve quickly to prevent further complications.

8. What is the prognosis for biliary colic?

The prognosis for biliary colic is generally favorable, especially when the condition is managed early and appropriately.

Most individuals with biliary colic experience relief with pain management and lifestyle changes, such as a low-fat diet. However, individuals who have recurrent episodes of biliary colic or are diagnosed with gallstones may require gallbladder removal surgery (cholecystectomy).

After the gallbladder is removed, most people recover fully and experience no further episodes of biliary colic. For those who do not undergo surgery, managing symptoms through diet, medication, and avoiding triggers can help control the condition.

Conclusion

Recognizing the warning signs and symptoms of biliary colic early on is essential for managing the condition and preventing further complications. If you experience sudden, severe abdominal pain, especially after eating fatty foods, it’s important to seek medical attention promptly.

With proper diagnosis and treatment, including lifestyle changes and, in some cases, surgical intervention, biliary colic can be effectively managed. By understanding the symptoms and causes of biliary colic, you can make informed decisions about your health and take proactive steps to reduce the likelihood of future attacks.

References:

• The Royal Australian College of General Practitioners – Biliary pain Work-up and management in general practice
• National Library of Medicine – Biliary colic: imaging diagnosis
• Gut and Liver – Epidemiology of Gallbladder Disease: Cholelithiasis and Cancer
• National Library of Medicine – Metabolic dysfunction-associated gallstone disease: expecting more from critical care manifestations
• Harvard Health Publishing – Biliary colic
• National Library of Medicine – Biliary Colic(Archived)
• Lee Surgery & Endoscopy – Biliary Colic
• RN – Cholelithiasis, Biliary Colic, Cholecystitis and Cholangitis:Adult & Pediatric
• American Academy of Family Physicians – Diagnosing Biliary Colic and Acute Cholecystitis
• Atlantic Health – Signs your gallbladder isn’t working properly
• National Library of Medicine – Risk Factors for Cholelithiasis