Gallstones: Symptoms, Causes & Treatment

Gallstones are solid deposits that form inside the gallbladder—a small organ located beneath the liver responsible for storing and releasing bile for fat digestion. These stones form from cholesterol or bilirubin (a substance from red blood cell breakdown) when bile becomes chemically imbalanced. It is estimated that 10-15% of the global population has gallstones, with prevalence increasing with age and obesity.

Notably, most gallstones (approximately 80%) remain asymptomatic and cause no symptoms throughout life. However, when stones obstruct the bile duct or migrate, acute symptoms may appear such as severe biliary colic and right upper quadrant abdominal pain. In Jordan and the Arab region, asymptomatic cases are often discovered incidentally during imaging for other reasons.

The disease is chronic in nature, yet approximately 1-3% of asymptomatic cases become symptomatic annually. Complications may include acute cholecystitis, pancreatitis, or jaundice due to bile duct obstruction.

Symptoms vary greatly: most people with gallstones experience no symptoms whatsoever. However, when stones move or obstruct bile ducts, acute symptoms emerge. Women may experience more severe symptoms than men, and symptoms often appear or worsen after fatty or heavy meals.

• Biliary colic: Sudden, sharp pain in the upper right abdomen (below the ribs) lasting 30 minutes to several hours.
• Right shoulder pain: Pain that may radiate to the shoulder and back (referred pain).
• Nausea and vomiting: Especially after fatty meals.
• Post-meal discomfort: Feeling of rapid satiety and bloating.
• Upper abdominal pain: May be continuous or intermittent.
• Constipation or diarrhea: Changes in bowel movements.
• Jaundice (yellowing of skin and eyes): In cases of bile duct obstruction.
• Fever: May indicate acute cholecystitis.
• Dark urine: Sign of bile duct obstruction.
• Pale or clay-colored stools: Indicates improper fat absorption.
• General weakness and fatigue: In severe chronic cases.
• Intolerance to fatty foods: Obvious sensitivity after consuming fat-rich meals.

• Cholesterol imbalance: When cholesterol concentration in bile becomes abnormally elevated, it precipitates as small crystals that gradually form stones.
• Bilirubin imbalance: Conditions with rapid red blood cell breakdown (such as sickle cell disease) raise unconjugated bilirubin levels that deposit directly in bile.
• Bile stasis: When the gallbladder contracts inefficiently or fails to empty completely, substances concentrate and stones form more easily.
• Obesity: Overweight individuals secrete higher cholesterol concentrations in bile.
• Rapid fasting: Prolonged periods without food concentrate bile substances.
• Pregnancy: Hormonal changes during pregnancy slow gallbladder emptying.
• Chronic diseases: Conditions like diabetes and liver cirrhosis increase stone formation risk.
• Age and gender: Older women are at highest risk, particularly after menopause.

• Female sex: Women are 3-4 times more likely than men, especially of reproductive age.
• Age over 40: Risk increases notably with advancing age.
• Heredity: Family history significantly raises risk.
• Obesity (BMI > 30): Direct correlation between excess weight and stone formation.
• Repeated pregnancy: Each pregnancy slightly increases risk.
• Chronic diseases: Diabetes, liver disease, inflammatory bowel disease.
• Hormonal medications: Oral contraceptives and hormone replacement therapy.
• Rapid weight loss: Crash diets may trigger stone formation.
• Frequent fasting: Irregular eating patterns increase risk.
• Cholesterol disorders: Elevated blood cholesterol levels.

Diagnosis relies on a combination of medical history, physical examination, laboratory tests, and imaging. Most gallstone cases are discovered while investigating another cause or incidentally during routine checkups.

• Physical examination: Includes palpation over the liver area (Murphy's sign) and assessment of dietary and symptom history.
• Ultrasound: First-line and most sensitive examination (95% accuracy); shows stones, their size, number, and signs of inflammation. Normal values: no stones or stones < 2 mm.
• Magnetic resonance imaging (MRI/MRCP): Particularly when common bile duct obstruction or stones in the main biliary duct are suspected.
• Laboratory tests:
  • Bilirubin: should be < 1.2 mg/dL (elevation indicates duct obstruction)
  • Alkaline phosphatase: should be 44-147 units/L
  • Liver transaminases (ALT/AST): should be < 40 units/L
  • Amylase: should be < 100 units/L (to exclude pancreatitis)
• Computed tomography (CT): May be requested to detect complications or complex cases.
• Endoscopic ultrasound (EUS): When fine anatomical details are needed.

Medications

• Pain relievers (Analgesics): Such as acetaminophen or ibuprofen for mild-to-moderate biliary colic. Avoid aspirin in acute cases.
• Anti-nausea medications (Antiemetics): Such as metoclopramide or ondansetron to manage nausea and vomiting.
• Ursodeoxycholic acid: May be used in select cases to dissolve cholesterol stones, but efficacy is limited and may take years.
• Antibiotics: May be administered if bacterial infection is suspected (acute cholecystitis).

Procedures and Surgery

• Laparoscopic cholecystectomy: The preferred and most common procedure. Small instruments are inserted through 3-4 tiny abdominal incisions. Recovery is 1-2 weeks with minimal pain compared to open surgery.
• Open cholecystectomy: Reserved for laparoscopy failures or complex cases. Larger incision and longer recovery (3-6 weeks).
• Extracorporeal shock wave lithotripsy (ESWL): Uses shock waves to fragment stones. Limited option and may not suit all cases.
• Endoscopic retrograde cholangiopancreatography (ERCP): Used for bile duct obstruction or stones in the common bile duct. A flexible tube is inserted through the throat, esophagus, and into the small intestine.

Lifestyle Changes

• Reduce fat intake: Gradually decrease consumption of fatty and fried foods, especially in the early post-diagnosis phase.
• Eat small, regular meals: Instead of large infrequent meals, to facilitate regular gallbladder emptying.
• Maintain healthy weight: Gradual weight loss (0.5-1 kg weekly) reduces symptoms.
• Drink plenty of fluids: Especially water, to help dilute bile.
• Dietary fiber: Increase vegetables, fruits, and whole grains to improve digestion.
• Regular physical activity: Moderate consistent exercise improves digestive system health.
• Manage stress: May worsen symptoms in some individuals.
• Avoid frequent fasting: Eat a light breakfast every day.

• Acute cholecystitis: Stones obstruct the gallbladder opening causing severe inflammation. Symptoms include severe pain, fever, nausea. May require emergency surgery if untreated.
• Biliary duct obstruction: Stones block bile ducts preventing bile flow. Causes jaundice and severe pain. Requires immediate medical intervention.
• Acute pancreatitis: When stones obstruct the pancreatic duct. Very serious condition potentially life-threatening. Mortality in severe cases can reach 5%.
• Jaundice: Yellowing of skin and eyes from elevated bilirubin due to duct obstruction. May require intervention to relieve obstruction.
• Ascending cholangitis: Bacterial infection from bile duct obstruction. Serious condition that can lead to sepsis if untreated promptly.
• Gallstone ileus: Very large stones may perforate the gallbladder wall causing small bowel obstruction. Rare but serious, requiring emergency surgery.
• Gallbladder cancer: Extremely rare but risk increases with long-standing stones and porcelain gallbladder.
• Chronic cholecystitis: Persistent inflammation causing gallbladder wall fibrosis and weakened function. May lead to chronic discomfort and pain.

• Maintain a healthy weight: Avoid obesity through regular physical activity and balanced diet. Gradual weight loss is preferable to rapid loss.
• Reduce saturated fat intake: Limit butter, full-fat cheese, red meat, and fried foods. Choose healthy oils like olive oil.
• Increase dietary fiber: Eat vegetables, fruits, and whole grains regularly. Fiber helps regulate cholesterol and bile levels.
• Eat regular meals: Do not skip breakfast and eat multiple small meals. Frequent fasting increases bile concentration.
• Drink plenty of water: At least 8 glasses daily helps dilute bile and prevent excess concentration.
• Exercise regularly: Moderate physical activity 30 minutes daily (brisk walking, swimming) improves digestion and metabolism.
• Control cholesterol levels: Regular screening and dietary modification. If needed, use cholesterol-lowering medications as prescribed.
• Avoid crash diets: Rapid weight loss may trigger stone formation. Lose weight gradually under medical supervision.
• Manage diabetes: Diabetic patients are at higher risk. Keep blood sugar within healthy range.
• Limit alcohol: Excessive alcohol may affect liver and gallbladder function. Drink moderately or abstain.